Log in
Add-on icon

Tree Style Tab version history - 25 versions

Tree Style Tab by Piro (piro_or)

4.5 Stars out of 5
5
1,642
4
268
3
99
2
62
1
94
Tree Style Tab version history - 25 versions

  • Be careful with old versions! These versions are displayed for testing and reference purposes.You should always use the latest version of an add-on.

  • Latest version

    Version 4.1.4

    Released Mar 13, 2025 - 1.1 MB
    Works with firefox 115.0 and later
    4.1.4 (2025.3.13)
    * Match styling of sound-playing/muted button to Firefox 136 and later.
    * Add a new option to show tab preview panel only in the sidebar area.
    * Fix mismatched checked state with special permission.
    * Add a mechanism to help collecting performance profile while initialization process.

    Source code released under Custom License

    You’ll need Firefox to use this extension
    Download Firefox and get the extension
    Download file

  • Older versions

    Version 4.1.3

    Released Jan 16, 2025 - 1.1 MB
    Works with firefox 115.0 and later
    4.1.3 (2025.1.16):
    • Show tab preview panel with visible background color on macOS.
    • Size tab preview panel in the contents area correctly on macOS Retina display. (regression on 4.1.2)
    4.1.2 (2025.1.14):
    • Avoid unexpected white background in the content area, when the Dark theme of Firefox is chosen with activate tab preview panel.
    • Apply uniform styling of the "sound playing" button on all themes including Photon.
    • Size tab preview panel in the contents area correctly, even if privacy protection is enabled (ex. privacy.resistFingerprinting=true.)
    • Add a new expert option to configure offset of the tab preview panel, for environments with enabled privacy protection.

    Source code released under Custom License

    Download file

  • Version 4.1.1

    Released Jan 10, 2025 - 1.1 MB
    Works with firefox 115.0 and later
    4.1.1 (2025.1.10):
    • Switch UI direction on RTL environments (using language with right-to-left direction, like Arabian.)
    4.1.0 (2024.12.25):
    • Reconstruct UI of the bookmarks creation dialog to simulate behaviors of the native one more.
    • Add ability to simulate tab preview panel on vertical tabs (requires the permission to run arbitrary scripts on webpages, aka "Access yuor data for all websites.")
    • Render descendants of a collapsed tree with better appearance based on HTML list, when tab preview panel simulation is available.
    • Revoke needless optional permissions when all features requiring the permission are disabled.
    • Add a new expert option to open dropped links in background tabs with discarded state.
    • Accept dropping of tabs and links onto the new tab button, like Firefox does.
    • Update styling of the sound playing state button in tabs to match to the native one on recent versions of Firefox.
    • Show a badge on TST's toolbar button and open the initial startup page by clicking of it, when it is the first time of TST installation, as a failsafe of the suppressable notifications.

    Source code released under Custom License

    Download file

  • Version 4.0.25

    Released Nov 11, 2024 - 1.07 MB
    Works with firefox 115.0 and later
    4.0.25 (2024.11.11):
    • Fix disability of get-tree API for other addons and disability of tree view in group tabs. (regression at 4.0.24)

    Source code released under Custom License

    Download file

  • Version 4.0.24

    Released Oct 29, 2024 - 1.07 MB
    Works with firefox 115.0 and later
    4.0.24 (2024.10.29):
    • Never store raw URL of tabs to save user privacy. Tab URLs were stored just to associate effective favicon URLs with tabs (so they were not sent to anywhere), but today, favicon URLs are exposed to addons as data: URIs and on mostcases there is no need to store effective favicon URLs. On required cases, only hashed strings are stored instead of raw URLs.
    • Never cache tree of private windows, to save user privacy.

    Source code released under Custom License

    Download file

  • Version 4.0.23

    Released Sep 11, 2024 - 1.07 MB
    Works with firefox 115.0 and later
    4.0.23 (2024.9.11):
    • Remove dependencies to CSS2 system colors deprecated at letely versions of Firefox.
    • Set text/plain drag data for shift-dragged tabs. Now you can drop tree items to any text input area.
    • Update overflow state of labels for recycled tab elements more certainly.
    • Reduce misdetection of tab closing/moving operations as internal operations.
    • Open options page from group tabs, in a foreground tab with no error.
    • Use text and bg colors of tabs same to Firefox's native tab bar on Windows 11. There is a difference v.s. the native tabs: colors of sidebar UI won't become pale in inactive windows.
    • Improve integration for bookmarks creation from drag-and-dropped tabs: Save tree structure to bookmarks even if they are dragged from Friefox's native tabs, but don't create new folder if dragged with no tree structure (flat tabs) whether from native tab bar or TST's sidebar.
    • Add ability to deactivate auto-grouping of bookmarks from dropped tabs with tree structure.
    • API: Add new notification type try-scroll-to-activated-tab to block auto-scrolling to the activated tab.
    • API: Expose a new tab state stuck as a part of tree item. It indicates that the tab is shown as stuck on an edge of the sidebar.
    • API: Deactivate tab tooltip completely when a blank text is registered with high priority.
    • Update nl locale by Vistaus. Thanks!

    Source code released under Custom License

    Download file

  • Version 4.0.22

    Released Aug 8, 2024 - 1.04 MB
    Works with firefox 115.0 and later
    4.0.22 (2024.8.9):
    • Fixup tree correctly after multiselected tabs are moved together by drag and drop on the horizontal tab bar or the Move Tab Hotkeys.
    • Synchronize throbber animations after the sidebar is reopened.
    • Keep highlighted appearance of multiselected tabs after the sidebar is reopened.
    • Track and update overflow/underflow state correctly even if legacy overflow/underflow events are disabled completely.
    • Restore "sticky" state of tabs correctly after tree restoration without cache.

    Source code released under Custom License

    Download file

  • Version 4.0.21

    Released Aug 3, 2024 - 1.04 MB
    Works with firefox 115.0 and later
    4.0.21 (2024.8.4):
    • Activate tree parent based on the user configuration more certainly if possible, when multiple tabs containing active are closed by one action.
    • Allow to close a group tab opened to replace a closed parent, when it is closed repeatedly. This behavior can be deactivated and you can keep such tabs unclosable like as old versions, with setting a secret option closeParentBehavior_replaceWithGroup_thresholdToPrevent to -1.
    • Reduce flashing of the vertical scroll bar on edge cases of overflowing.
    • Don't place new child tabs opened from a pinned tab at odd location, even when there is any waiting-to-be-grouped tabs and the system is slow.
    • Keep structure of grouped tabs as possible as we can, when partial tabs in existing trees are grouped via the group-tabs API.
    • Suppress flashing of the scrollbar on an edge case with the Photon theme.
    • Ignore mouse clicks only on animated closing tabs more certainly, to prevent detection of those clicks as ones on the blank area of the tab bar.
    • Determine to apply multi-column layout (or don't) to the tree in a group tab more robustly, even if its appearance is modified by the user style sheet.
    • Expose expert options temporarily when the options page is opened from internal links and the referred option is hidden as an expert option.
    • Link to the suitable option to deactivate the behavior, from a group tab opened to group children of pinned tabs.
    • Don't check the checkbox to control middle-click-paste on the new tab button, when the permission is granted but internal option is still deactivated.
    • Suppress error from missing dataTransfer of drag-and-drop events.

    Source code released under Custom License

    Download file

  • Version 4.0.20

    Released Jun 28, 2024 - 1.04 MB
    Works with firefox 115.0 and later
    4.0.20 (2024.6.28):
    • Fix initialization failure from unhandled IndexedDB errors.

    Source code released under Custom License

    Download file

  • Version 4.0.19

    Released Jun 24, 2024 - 1.04 MB
    Works with firefox 115.0 and later
    4.0.19 (2024.6.24):
    • Defer scrolling to the successor active tab until the mouse pointer leaves from the sidebar area, if the successor is chosen by something feature like browser.tabs.selectOwnerOnClose out of the visible area. You can disable this behavior by setting deferScrollingToOutOfViewportSuccessor to false.
    • Activate explicitly specified successor tab if possible, after multiple tabs are moved across windows by drag-and-drop.
    • React to "Simulate Up/Down/Left/Right Key on Tree" keybaord shortcuts as tree available, even if the sidebar panel is opened in a separate window by Tree Style Tab in Separate Window or someone.
    • Add ability to control temporary state of group tabs opened by API.
    • Never insert extra contents to non-tab elements in non-target windows via API, if the target window is explicitly specified.

    Source code released under Custom License

    Download file

  • Version 4.0.18

    Released Jun 12, 2024 - 1.04 MB
    Works with firefox 115.0 and later
    4.0.18 (2024.6.13):
    • Add "Close Duplicated Tabs" context menu command to simulate the command of Firefox 127 and later.
    • Change default shortcut to simulate arrow keys on tree for macOS: Alt-Shift-Uo/Down/Left/Right to MacCtrl-Shift-Uo/Down/Left/Right.
    • Right/down arrow keys simulation now fallbacks to "focus to the next tab" correctly while the sidebar is closed.
    4.0.17 (2024.6.10):
    • Fix misindentation of tabs immediately moved after opened. (regression on 4.0.16)
    • Fix misindentation of deeply nested tree on the startup. (regression on 4.0.16)
    4.0.16 (2024.6.9):
    • Add new keyboard shortcut slots "Simulate Up/Down/Left/Right Key on Tree" and assign default shortcuts Alt-Shift-Up/Down/Left/Right. They provide both spatial focus move on faviconized tabs and collapse/expand tree like arrow keys on tree items.
    • Add new keyboard shortcut slots "Collapse Tree or Focus to Parent Tab" and "Expand Tree or Focus to First Child Tab" to simulate Left/Right Arrow keys on tree items.
    • Wheel scrolling on pinned tabs and keyboard shortcuts to scroll the tab bar with focused pinned tab now scroll regular tabs if the container of pinned tabs is not scrollable.
    • Optimize operations to track updated overflow/underflow state.
    • Better drag and drop of tabs/trees across windows: the tree structure is kept better, temporary group tabs are kept, and moved tabs are kept discarded.
    • Move focus to the parent tab as configured, when a last child tab is closed after it was reopened.
    • Reduce needless animation effects unexpectedly re-applied to tabs rendered while virtual scrolling.
    • Fix unexpected classes on tabs in the sidebar which are left by misordered operations.
    • Fix unexpected infinit loop (caused increasing of CPU usage and blocking of GC) triggered by extra tab contents above/below individual tab.
    • Update zh_CN locale by NightSharp. Thanks!
    • Update ru, de and en locales by vadcx. Thanks!

    Source code released under Custom License

    Download file

  • Version 4.0.15

    Released May 20, 2024 - 1.03 MB
    Works with firefox 115.0 and later
    4.0.15 (2024.5.21):
    • Treat drag and drop of a parent tab to its descendant as a dragging of an individual tab and attach it to the drop position, even if the default action is configured to drag the whole tree. You can deactivate this behavior and prevent dropping of a parent tab to its descendant to turn the hidden option moveSoloTabOnDropParentToDescendant to false.
    • Don't inherit container to an opened tab if it is opened by "Open in Container Tab" => "No Container" inin the native tab context menu.
    • Never use overflow and underflow events to become compatible with Firefox 128 and later.
    • Add new keyboard shortcut slots for "Toggle Tree Collapsed" and "Toggle Tree Collapsed Recursively" commands.
    • Add a new option to show/hide TST's context menu commands on the native tab bar.
    • Become more robust for cases that tabs are opened while the initialization process.
    • Fix odd behavior after rendering error when the sidebar panel is shown with zero-width.
    • Show container marker with thin width even if tabs are shown with expanded height.

    Source code released under Custom License

    Download file

  • Version 4.0.14

    Released Apr 16, 2024 - 1.03 MB
    Works with firefox 115.0 and later
    4.0.14 (2024.4.17):
    • Allow to detach tab from window even if the source window is maximized or fullscreen. (regression on 4.0.13)
    • Prevent unexpected jumping of tabs on scrolling, when tab height is expanded by extra tab contents above/below tabs provided by helper addons.

    Source code released under Custom License

    Download file

  • Version 4.0.13

    Released Apr 10, 2024 - 1.03 MB
    Works with firefox 115.0 and later
    4.0.13 (2024.4.10):
    • Apply new-tab-command-tab behavior correctly. (regression on 4.0.12)
    • Use GrayText instead of ButtonText as the tabs border color in the "High Contrast" theme, to reduce stresses from too high contrast.
    • "Move Tab" => "Move to New Window" in the context menu on the sidebar now moves whole tree always.
    • "Move Tab" => "Move to New Window" opens a new window shifted from the source window a little.
    • Don't deactivate unrelated options even if <all_urls> permission is not granted.
    • Fix unexpected reloading of the sidebar panel on tab attaching/detaching.
    • Add a new secret option syncActiveStateToBundledTabs to suppress expanding of the tree and scrolling to it for group tabs bundled to a pinned tab, when the pinned tab become active.

    Source code released under Custom License

    Download file

  • Version 4.0.3

    Released Mar 12, 2024 - 1.02 MB
    Works with firefox 115.0 and later
    4.0.3 (2024.3.13):
    • Fix miscalculation of drop position on tabs on the "Photon" theme.
    • Expand height of the container of pinned tabs more correctly on edge cases.
    4.0.2 (2024.3.13):
    • Fix performance degression around detection of tab label overflow state.
    • Fix needless blank space below last tab on the "Photon" theme.
    • Fix blank dialogs when the "Access your data for all websites" permission is not granted.
    • Hide unexpectedly shown menu items in the context menu.
    • More respect labels of menu commands in the context menu on blank area of the tab bar.
    • Update zh_CN locale by NightSharp. Thanks!

    Source code released under Custom License

    Download file

  • Version 4.0.1

    Released Mar 7, 2024 - 1.02 MB
    Works with firefox 115.0 and later
    4.0.1 (2024.3.8):
    • Tabs containing sticky tabs are kept expanded when another tree is expanded, even if those tabs are sticked via API.
    4.0 (2024.3.7):
    • Improved performance on cases with large number of tabs. Now tabs only in the viewport are rendered.
    • Introduce new context menu commands and other triggers to stick arbitrary tabs to edges of the tab bar. It is similar to "Pin/Unpin Tab" but sticked tab keeps its tree.
    • Indicate sharing state of tabs (camera, microphone and/or screen) with icons.
    • Show dropshadow before normal tabs when the tab bar is scrolled.
    • Show dropshadow after normal tabs when the tab bar is not fully scrolled.
    • Use cached tree structure information more aggressively on Firefox startup, if the number of tabs, pinned status, and containers are matched.
    • Add ability to control tabs opened from Firefox View.
    • Suppress bookmarks folder auto creation for bookmarks from tabs, when multiple bookmarks are copied via the Library or something way.
    • Move descendant tabs also correctlyfollowing to their parent, when a parent tab is moved to the top level via Firefox's horizontal tab bar.
    • Apply the option to place opened tabs next to the last related child correctly, when multiple tabs are opened from a pinned tab.
    • Avoid unexpected restoration of blank dialog windows by Ctrl-Shift-T on Firefox 116 and later.
    • Restore tree structure more correctly for reopened tabs which were closed at a time.
    • Lock scroll position temporary when a tree near the tab bar end is collapsed, just like as the case when tabs are closed.
    • Open local files in tabs with blob: URL when they are dropped to the tab bar, instead of simply ignored.
    • Never create needless multiple folders for bookmarks created from tabs tree.
    • Most options are now treated as expert options and hidden by default.
    • Many API improvements.
    • Most of improvements at this version is sponsored by the Waterfox project / BrowserWorks Ltd. Many thanks to Alex Kontos! (Announcement blog entry at Waterfox project)
    • See also histories section of the project page or the release page on GitHub to get full changelogs.

    Source code released under Custom License

    Download file

  • Version 3.9.22

    Released Jan 30, 2024 - 1,011.17 KB
    Works with firefox 115.0 and later
    3.9.22 (2024.1.31):
    • Fix failed initialization when an optional permission "Read and modify bookmarks" is not granted. (regression on 3.9.21)
    3.9.21 (2024.1.26):3.9.20 (2024.1.18):
    • Drop support of Firefox older than 115.
    • Restructure options about new tab position control, to reduce overlapped effects of multiple options. Now you can choose "open tab as a first/last child" for each option directly.
    • Expose expert options to control behavior of new tabs opened from links and the "New Tab" command in the simulated tab context menu.
    • Use on-memory storage for the cache of sidebar contents, to prevent bloating of Firefox's session file. This means that initialization on the browser startup takes more time, and you can take the old behavior back by a new advanced option.
    • Guess tabs opened by the "New Tab" command more certainly.
    • Suppress too much RAM usage problem with some themes with animations. (See also the bug 1875100.)
    • Store device ID more safely for the simulated Sync feature.
    • Update zh_CN locale by NightSharp. Thanks!

    Source code released under Custom License

    Download file

  • Version 3.9.19

    Released Nov 20, 2023 - 1,013.45 KB
    Works with firefox 102.0 and later
    3.9.19 (2023.11.20):
    • Don't reopen tabs with URL unopenable with addon's permission (local file, about: URL and so on) even for container inheritance.
    • Deactivate "Open in New Container Tab" context menu command for tabs with unreopenable URL.
    • Use icon color same to Firefox 120.
    3.9.18 (2023.11.10):
    • Add context menu commands and keyboard shortcut slots "Mute/Unmute this Tree" and "Mute/Unmute Descendants".
    • Increase default interval of the heartbeat between sidebar pages and the background page from 1sec to 5sec for less CPU usage.
    • Optimize performance of updating maximum tree level on situations with disabled animation.
    • Determine color of SVG icons for the platform color mode (dark or bright), based on the CSS prefers-color-scheme feature.
    • Update fr locale by cayenne17. Thanks!
    3.9.17 (2023.9.8):
    • Handle tabs internally moved by TST itself more correctly. Reduced wrong placements of tabs opened from a pinned parent on some situations.
    • Optimize initialization process of the tab context menu on the sidebar page. Reduced delayed update of menu items after the menu appears on the screen.
    • Reduced visual gap between the last tab and the new tab button in a scrollable tab bar with the Proton theme.
    • Successfully detach a tab to a new window when a tab is dragged, moved to streight left or right and dropped at undroppable location, more certainly. The operation was unexpectedly blocked by a workaround for an old issue already fixed at Firefox 71.
    • Treat dropped multiselected tabs from Firefox's native tab bar as dropped tree items.
    • Update link to the list of known helper addons: now it is an wiki page.
    • Introduce a workaround for a platform specific problem: unexpected reaction for drag events is triggered after a finished drag-and-drop actions.
    • API: Add new notification type try-collapse-tree-from-collapse-command and try-collapse-tree-from-collapse-all-command to allow blocing of collaption of tree by commands.
    • Updated style definition of tree twisties: now their positioning can be customized with margin and padding more easily.
    • Uniform to label the feature to apply custom user style definitions as "User Style Sheet".
    • Update ru locale by wvxwxvw. Thanks!

    Source code released under Custom License

    Download file

  • Version 3.9.16

    Released Jul 21, 2023 - 1,008.42 KB
    Works with firefox 67.0 and later
    3.9.16 (2023.7.21):
    • Reduce RAM usage around favicons.
    • Right-click on the "new tab" button now opens containers selector like recent versions of Firefox.
    • Expand ancestors tree while a tab is moved by Ctrl-PageUp/PageDown for better usability.
    • Keep tabs scroll-locked even if the cursor is moved while the last tab is being removed.
    • Keyboard shortcuts to move focus to next/previous sibling now cycles focus between sibling tabs.
    • Add a new expert option to put tabs under a group tab always, even if they are opened from a bookmark folder and already organized as a tree. On such situations TST suppresses opening a group tab, because the group tab was initially introduced just to organize flat tabs opened from a bookmark folder as a tree.
    • Attach child tab to the opener tab correctly even if the opener had no child and "when a tab is opened from existing tab, open it as: a child of the parent tab, next to the recently opened child" is chosen.
    • Create bookmark item for the first group tab correctly, if there are multiple root level group tabs in the selection.
    • Use bright border color for "drag and drop" options on the dark mode.
    • Match styling of active and highlighted tabs on Proton theme, for Firefox 102 and later.
    • Render box-shadow of the active tab on Proton theme more similar to Firefox's native tabs.
    • Update de locale by juwbr. Thanks!

    Source code released under Custom License

    Download file

  • Version 3.9.15

    Released Mar 24, 2023 - 1,004.46 KB
    Works with firefox 67.0 and later
    3.9.15 (2023.3.24):
    • Never reload infinitely after tabs are detached from a regular window to a popup window (by Popup window or someone).
    • New blank tabs reoepend with the container inherited from the active tab are activated correctly.
    • Increase heartbeat interval automatically between sidebars and the controller, to prevent unexpected disconnection on cases where very large number of tabs. This introduces a side effect: the toolbar button and the keyboard shortcut to toggle the sidbar visibility may requrie more delay when there are large number of tabs.

    Source code released under Custom License

    Download file

  • Version 3.9.14

    Released Mar 13, 2023 - 1,003.87 KB
    Works with firefox 67.0 and later
    3.9.14 (2023.3.13):
    • Better simulation of browser.tabs.selectOwnerOnClose on slow environment.
    3.9.13 (2023.3.12):3.9.12 (2023.1.7):
    • Allow to close tabs via group tab pages (middle-click or closeboxes.)
    • Reduce flicker while updating tab list in group tab pages.
    • Accept multiple URLs for new tabs (to support new tabs on both regular and private browsing windows.)
    • Better synchronization of loading throbbers (by Lej77, thanks!)
    3.9.11 (2022.12.6):
    • Group tabs not from bookmarks with user's choice correctly. (regression on 3.9.8)
    • Enlarge input fields for some options to input numbers.

    Source code released under Custom License

    Download file

  • Version 3.8.26

    Released Jul 14, 2022 - 992.39 KB
    Works with firefox 67.0 and later
    3.8.26 (2022.7.15):
    • Make some user styles written for old versions of TST effective. See the related issue also for more details.
    • Prevent zoom-in/out by pinch-in/out on macOS.
    • Add a secret option enableWorkaroundForBug1763420_reloadMaskImage for an ability to deactivate a workaround for the missing icons problem.
    • Update ru locale by wvxwxvw. Thanks!

    Source code released under Custom License

    Download file

  • Version 3.8.25

    Released Jul 7, 2022 - 991.72 KB
    Works with firefox 67.0 and later
    3.8.25 (2022.7.8):
    • Restructure options about new tabs behavior to make more understandable.
    • Introduce workaround for missing icons problem.
    • Add special favicons for blocked pages.
    • Update fr locale by tbertels. Thanks!
    3.8.24 (2022.6.2):
    • Shift twisties in tabs to avoid covered by the scrollbar, on macOS, Linux and Windows 11.
    • Keep label of group tabs correctly after they are moved.
    • Send tab-mouseover and other notifications to helper addons correctly after the sidebar is reopened.
    • Better auto-sizing of the dialog for confirmation on grouping of tabs.
    • Deactivate a workaround of problems around wrong coordinates of dragend events on Firefox 99 and 100 (the bug 1767165) on other versions.
    • API improvement: Add a new notification message type new-tab-processed to handle new independent tabs.
    3.8.23 (2022.5.1):
    • Introduce a workaround of problems around wrong coordinates of dragend events on Firefox 99 and later (the bug 1767165). It reduces unexpected detaching of tabs especially on a rightside placed sidebar. This workaround can be disabled by unchecking enableWorkaroundForBug1767165_fixDragEndCoordinates via TST Options - "Development" - "All Configs".
    3.8.22 (2022.4.22):3.8.21 (2022.2.13):
    • Accept dragged items from TST Bookmarks Subpanel 1.2.4 and later.
    3.8.20 (2022.2.8):
    • Fix odd behaviors around drag operations on Firefox 97 and later.
    • Inherit container from the active tab to new tabs more safely by reopening, without losing their URL.
    • Accept double quotations in tab titles for a bookmark title.
    • Don't expand tree by long-press of the Ctrl key, when Ctrl-Tab handling is not granted.
    • Show "gear" favicon for "about:config" tabs (follow-up of a change on Firefox 98).
    • Update de locale by SammysHP. Thanks!
    3.8.19 (2022.1.13):
    • Show tabs with readable background color on the combination of "High Contrast" theme and the dark color scheme of Windows 10, on Firefox 96.0 and later.
    • Update ru locale by wvxwxvw. Thanks!
    3.8.18 (2021.12.26):
    • Keep TST's sidebar page loaded in regular tabs even if tabs are dropped on some situations, for example a combination with Tree Style Tab in Separate Window and TST's option to deactivate tab detaching.
    • Add a secret option to deactivate sync configs across devices via Firefox Sync (TST's options => Development => All Configs => syncEnabled). This was introduced for a workaround about high CPU usage problem triggered by sync.
    3.8.17 (2021.12.15):
    • Attach tabs sent from other devices to the tree correctly, even if they are sent while the receiver Firefox is not running and browser.tabs.insertAfterCurrent is true.
    • Put a set of tabs from other device together in a place instead of jumped positions if possible, when browser.tabs.insertAfterCurrent is true. (Set a secret option fixupOrderOfTabsFromOtherDevice to false when you want to deactivate the behavior.)
    • Respect the right-to-left mark at the beginning of a page title.
    • Better appearance of the counter for collapsed descendant tabs in the Sidebar theme.
    • Don't collapse tree by double-click on tab closeboxes. It accidentally collapsed the closing tree and closed all descendant tabs unexpectedly.
    • Treat middle-click and accel-click actions on the "New Tab" command in the context menu on tabs same to actions on the "New Tab" button, in the sidebar.
    • <tab-item-substance>, <tab-label> and <span class="label-content"> now inherit data-tab-id and data-window-id attributes from the parent element (<tab-item>) for more customizability with custom user styles.
    • Highlight tabs with "attention" class same as Firefox's native tabs even if they are not faviconized.
    • Use highly-visible (darker) background certainly with the "High Contrast" theme on Linux.
    3.8.16 (2021.11.11):
    • Fade-out long tab labels to left or right, only based on the direction of the label text themselves instead of a global option.
    • Remove an option to set global text direction of tab labels.
    • Update ko locale by OctopusET. Thanks!
    3.8.15 (2021.10.25):
    • Apply container information saved by Container Bookmarks correctly for tabs opened from a bookmark folder by the "Open All as Tree" context menu command.
    • Collapse tabs dropped onto a collapsed tree correctly, when the drop target parent tab is kept collapsed by TST Lock Tree Collapsed.
    • Add a secret option to deactivate API for other addons: APIEnabled
    • Update zh_TW locale by SiderealArt. Thanks!
    3.8.14 (2021.10.15):
    • Apply given colors to the toolbar button icon, menu icons and the sidebar header icon, if the theme provides rich information (ex. Colorways of Firefox 95 and later).
    3.8.13 (2021.10.3):
    • Fix unexpectedly invisible children when a parent tab is restored and collapsed tabs are re-attached to the restored parent.
    • Outdent tab via API correctly when a child tab is outdented to the root level with its descendants.
    • Update zh_CN locale by NightSharp. Thanks!
    3.8.12 (2021.8.26):
    • Update scrollability status of the tab bar even if there are some "hidden via WebExtensions API, but visible by CSS hack" tabs.
    • Reduce (deactivate) mis-detection of the sidebar position on some unstable cases: leftside non-primary and high-dpi screen.
    • Use an info icon same to the one in the Proton theme of Firefox itself, for network error pages.
    • Suppress unexpected expansion after a parent tab lost its focus, while tab swhiching via Ctrl-Tab.
    • Open the options page when some drag-and-drop options are chosen in the shorthand menu on the toolbar icon.
    • Reload the sidebar automatically for unexpected fatal error while its initialization, to reduce failing of sidebar initialization.
    • Update ru locale by wvxwxvw. Thanks!
    • Update ko locale by OctopusET. Thanks!
    • Update zh_CN locale by NightSharp. Thanks!
    3.8.11 (2021.8.17):
    • Show a confirmation to apply "Right Side" appearance for the sidebar panel shown at the right side when it is initially detected.
    3.8.10 (2021.8.17):
    • Show a confirmation to apply "Right Side" appearance for the sidebar panel shown at the right side when it is initially detected.
    3.8.9 (2021.8.15):
    • Apply appearance matching to sidebar position (left or right) automatically by default. After you switch the siderbar position, you need to reopen TST's sidebar panel to apply matching apperance.
    • Introduce an expert option to allow detach dragged tab from the window even if it is dropped near the sidebar, for people using privacy.resistFingerprinting=true.
    • Better tree restoration on browser startup, if the delay to detect duplicated tabs is configured for recent versions of Firefox.
    • Better compatibility with addons which reopen the initial tab of a new window immediately (e.g. Temporary Containers).
    • Import and export all configs more safely with sanitization of device specific config keys.
    • API improvement: introduce new notifications tabbar-overflow and tabbar-underflow.
    • API improvement: scrolled notification now provides new property overflow indicating overflow state of the tab bar.
    • Update ru locale by wvxwxvw. Thanks!
    3.8.8 (2021.7.17):
    • Clear indentation of left tabs correctly after multiple ancestors are closed at a time.
    • Allow to drop Firefox's native tabs to TST's sidebar. (regression on recent versions)
    • Give static aria-label for in-tab button elements. This change should improve compatibility with some voice recognition systems including Dragon.
    3.8.7 (2021.7.8):
    • Fix odd appearance of the Photon theme. (regression on 3.8.5)
    • Calculate total height of visible tabs more safely.
    3.8.6 (2021.7.7):
    • Fix visual corruption on very old versions of Firefox. (regression on 3.8.5)
    3.8.5 (2021.7.6):

    Source code released under Custom License

    Download file

  • Version 3.8.4

    Released Jun 20, 2021 - 957.82 KB
    Works with firefox 67.0 and later
    3.8.4 (2021.6.20):
    • Update overflow state of tabs more correctly to avoid unexpected covering of the bottom most tab with the new tab button.
    • Update visibility of tab context menu items correctly even if it the initial run.
    • Restore tree structure more correctly for tabs reopened via Shift-Ctrl-T after closing of multiple tabs at a time.
    • Allow to override size of pinned tabs area (--pinned-tabs-area-size), subpanel area (--subpanel-area-size), and new tab button area (--after-tabs-area-size) easily by overriding these variables with custom user style.
    • Rescue errors of options UI initialization, and reveal options UI even if some options don't work.
    • Don't close the new tab button long-press menu on mouseup. (regression on 3.8.2)
    • Restore lost compatibility with user styles containing --multiselected-color. (regression on 3.8.2)
    3.8.3 (2021.6.13):
    • Recontstruct "Proton" theme for better compatibility with Firefox's themes, dark mode of the platform, and GTK theme.
    • Avoid needless 1sec delay of confirmation dialogs.
    • Update ru locale by wvxwxvw. Thanks!
    3.8.2 (2021.6.11):
    • More natural appearance of the theme "Proton" matching to Firefox's Proton theme.
    • The new tab button is now draggable as a link to the URI about:newtab, with the Shift key. This means that you can open a new tab at arbitrary position in the sidebar via drag and drop.
    • Add icons to the new tab action selector panel for better user experience.
    • Accessible labels of faviconized tabs from screen readers and voice recognition systems.
    • Allow to open about:newtab links dropped in the sidebar.
    • Show confirmation dialogs in the sidebar more safely even if they are triggered by quick actions.
    • Never open new tab by middle click on confirmation dialogs shown in the sidebar.
    • Never show invalid "undefined" item in the list of other devices.
    • Apply the height of the user style editor immediately when a different value is imported.
    • Open new blank tab as a child correctly, even if the insertion position is configured as "no control" or "next to the recently opened".
    • Re-introduce an option to change the color of the toolbar icon, for better accessibility.
    • Don't clear drop position marker while dragging, on Linux environment.
    • Save changed config of the new tab insertion position via the right click menu on the toolbar button correctly.
    • Try applying the background color to the sidebar ASAP.
    • Allow to toggle muted state of tabs even if it is not sound-playing (if the mute button is shown forced by custom user styles).
    • Subpanel contents now have its owner window's ID as the windowId URL parameter, by NiklasGollenstede. Thanks!
    • Subpanel is now restricted to a page contained in the provider extension itself, by NiklasGollenstede. Thanks!
    • API improvement: Add ability to handle and override events on the new tab button via notification messages with types new-tab-button-mousedown, new-tab-button-mouseup and new-tab-button-clicked.
    • API improvement: Add ability to control extra contents in the new tab button via messages with types set-extra-new-tab-button-contents and clear-extra-new-tab-button-contents.
    • API behavior change: tab-clicked type message is now delivered only when both tab-mousedown and tab-mouseup are not canceled.
    • Update de locale by SammysHP. Thanks!
    • Update ko locale by BoredSomeone. Thanks!
    3.8.1 (2021.5.7):
    • Prevent inifinite toggling of the sidebar scrollbar on macOS, when there are enough number of tabs which triggers overflowing. The fix was unexpectedly lost on the released version 3.8.0.
    • Update ru locale by wvxwxvw. Thanks!
    3.8.0 (2021.5.5):
    • Restructure behaviors about closing and moving of a parent tab.
      • In the sidebar, now there are some permanently fixed behaviors and some configurable presets:
        • Closing a parent tab with collapsed tree: closes the entire tree.
        • Moving a parent tab with collapsed tree: moves the entire tree.
        • Moving a parent tab with expanded tree: behaves according to configurations under the section "Drag and Drop".
      • There is a preset for people using Firefox's native tab bar as an UI to operate solo tab. In this case all tab operations done outside of the sidebar (Firefox's native tab bar, keyboard shortcuts, or other addons) are treated as operations for solo tabs, not tree of tabs.
      • There is a preset for people desireing TST to control tabs as trees always. In this case all tab operations are treated same as operations in the sidebar, even if it is done on Firefox's native tab bar, keyboard shortcuts, or other addons.
      • Otherwise you can configure behaviors for each case: closing of a parent with expanded tree in the sidebar, closing of a parent with collapsed/expanded tree outside of the sidebar, moving of a parent with collapsed/expanded tree outside of the sidebar, and more options for cases with closed sidebar.
    • Better accessibility information for the sidebar. This change should help controlling of the sidebar via speech recognition.
    • Add the simulated "New Tab" context menu command on tabs.
    • "Close Tabs to the Bottom" and "Close Other Tabs" context menu commands now skips collapsed descendants of the context tab.
    • Open tabs from a bookmark folder with correct order. (This looks to be a regression on recent versions.)
    • Prevent inifinite toggling of the sidebar scrollbar on macOS, when there are enough number of tabs which triggers overflowing.
    • On macOS, in-tab padding is correctly applied avoiding the scrollbar covers clickable UIs. (It was applied to wrong side.)
    • Proton theme: Show container identifier line at top of pinned tabs.
    • Proton theme: Remove separator border between pinned tabs and regular tabs.
    • Apply the icon color or the text color defined by the active theme to TST's toolbar button icon, context menu icon, and the sidebar panel switcher.
    • Rebuild sidebar contents more certainly when mis-synchronization between the main process and the sidebar contents is detected.
    • Becomes to more robust around tabs reopened immediately by other addons like Temporary Containers.
    • Becomes to more robust around closing/moving of parent tabs as solo tabs.
    • Don't show needless "Send Tab to Device" simulated context menu item in the context menu on non-tab area.
    • Open duplicated tabs based on the configuration more correctly.
    • Expose an expert option UI to control the number of scroll lines for keyboard shortcuts.
    • The height of the subpanel is now saved and restored for each provider addon.
    • Better appearance for the subpanel switcher: more easily recognized as a switcher UI.
    • Accept icon images with non 16px size for the subpanel switcher.
    • API improvement: now you can specify initialHeight or fixedHeight for your subpanel.
    • API improvement: custom state of tabs are added/removed safely even if they are given as any type value not a string.
    • API improvement: Support CSS length delta and position parameters for the scroll API.
    • API improvement: Support duration parameter for the scroll API.
    • API improvement: Add new API stop-scroll to cancel in-progress scroll animations.
    • Update ru locale by wvxwxvw. Thanks!

    Source code released under Custom License

    Download file

  • Version 3.7.4

    Released Mar 30, 2021 - 931.68 KB
    Works with firefox 67.0 and later
    3.7.4 (2021.3.31):3.7.3 (2021.3.1):
    • Add support for Firefox 88+ compatible "Close Tabs to the Left (Top)" context menu command.
    • Prevent the cached helper addon IDs to be synchronized via Firefox Sync. This should solve problems around initialization of helper addons after TST is updated dynamically.
    • Don't apply "Tabs from any other trigger" option for new tabs opened from TST's new tab button and the new tab action menu.
    • Show tab drag feedback images at bottom-right of the cursor like Firefox does, for better visibility of drop targets.
    • Update ru locale by wvxwxvw. Thanks!
    3.7.2 (2021.2.19):
    • Limit maximum rows of pinned tabs (50% height of the sidebar by default) and allow to scroll pinned tab rows with the wheel.
    • Keep tree structure more robustly for tabs immediately closed and reopened with different contaienr by any other addon.
    • Don't restore closed tabs doubledly on a restoration with Ctrl-Shift-T.
    • Restore root level tabs to their original position correctly, even if "new tabs from any other trigger" option is changed. (regression on recent versions)
    • Clean up only dummy group tabs even if "Close descendants too" is chosen for options under the "When a parent tab is closed or moved just as a solo tab" => "Custom" section.
    • Apply "When a parent tab is closed or moved just as a solo tab" => "Recommended behavior for people who still use the native tab bar of Firefox itself also" => "Replace closed parent with a dummy tab and keep the tree" behavior correctly. (regression on recent versions)
    • Show confirmation for closing descendants when a collapsed tree is closed via keyboard shortcuts. (regression on recent versions)
    • Move detached descendants after all other existing descendants automatically, to keep correct tree structure. (regression on recent versions)
    • Add an expert option to change acceptable accelerator key to match the one on Firefox itself modified via ui.key.accelKey.
    3.7.1 (2021.2.12):
    • Consistent the position of the new tab action selector button in both regular and private windows.
    • Update ru locale by wvxwxvw. Thanks!
    3.7.0 (2021.2.9):
    • Show in-tab container indicators (colored bars) with a styling more similar to Firefox's native one.
    • Introduce syntax highlighing in the user styles editor (based on the CodeMirror.)
    • Remember the height of the user styles editor.
    • Cancel the visual gap of tabs produced with dynamically showing/hiding toolbars only when it is triggered by mouse operations on the sidebar in regular windows (not fullscreen mode), by default.
    • Add a new expert option to control how tabs to be opened for any other cases not covered by existing options.
    • Deactivate "Reopen in Container" and other container tab related features for private windows, like as Firefox itself does.
    • API improvement: introduce *-of-<id> suffixed keywords to get tabs based on relations from any arbitrary tab.
    • API improvement: introduce lastDescendant keyword to get tabs based on tree structures.
    • Update ru locale by wvxwxvw. Thanks!
    • Update de locale by SammysHP. Thanks!

    Source code released under Custom License

    Download file