- Fixed a crash that may occur if website icons take too long to load when first opening the UI. ("NanoTimeoutError") [#214]
- Fixed a crash that may occur if the Tab Stash UI loses contact with the Tab Stash background page. ("Disconnected" error) [#223]

- Improved: Processing and cleanup of deleted items now uses much less CPU. [#172]
- Improved: The "safety net" added in v2.10.1 will now use much less CPU if it is invoked repeatedly. Also, if a crash occurs, a (hopefully) helpful error message will be displayed to help with troubleshooting. [#201]
- Fixed an issue that could prevent loading website icons or deleting stashed tabs in some situations. [#181]
- Fixed an issue causing stashed or imported tabs to be added to a recently-created group by mistake.
- Stashing or importing multiple tabs at once will now create a new group as expected. [#179, #190]
- Fixed: Import will now ignore invalid URLs and empty groups without crashing. [#204]
- Fixed: The collapsed state of "Unstashed Tabs" will no longer be forgotten on browser restart (or once a day). [#210]
- Removed: Tab Stash will no longer restore tabs that were recently-closed. Recent versions of Firefox introduced a bug which made this functionality restore the wrong tab at times. (This feature is still available as an experimental feature for those who want to continue using it.) [#188]

Version 2.10.1

- Improved: Added a "safety net" which reloads the browser data used to display the UI if the UI detects that it's gotten out of sync with the browser.
- Fixed an issue which would sometimes cause Tab Stash to lose track of the focused window, preventing the UI from opening.
- Fixed an issue that would in some cases cause Tab Stash to lose track of tabs that are moved between windows.
- Fixed: Restoring a tab that's already open in another window will no longer move the tab from the other window into the current one. A new tab will be created instead.

Version 2.10

- New: Select and move multiple tabs at once using drag-and-drop or the new selection menu. Click on a tab's icon to get started! [#57]
- New: If you want to see which tabs in a particular group don't match your search, click the "+ N Filtered" label to show all tabs in that group.
- Improved: Group names are now searched along with tab titles and URLs. If you have a lot of groups, it's now easier to find the one you're looking for. [#118]
- Improved: "Delete" buttons are now shown even on collapsed groups. Now that Tab Stash can un-delete items, there's no reason to hide the "delete" buttons anymore since a mistake is easy to fix. [#160]
- Improved the aesthetics of the UI in various small ways (most notably, a default icon is now shown for tabs that don't have one).
- Improved: Lots of behind-the-scenes improvements to pave the way for new features and better performance.
- Fixed: Tab Stash no longer stashes new/blank tabs. This also means that, if we are asked to stash tabs when only a new tab is open, we won't create a group with just a single, lonely new tab. [#122]

- New: Force Tab Stash to use either light or dark colors from the options page, so you can use Tab Stash with any browser theme and the colors won't clash. [#108]
- New: Switch between "compact" and "normal" spacing and fonts from the options page, so you can see more of your stashes at once. [#13]
- Improved: The active tab is now marked, so you can always see where you are. [#89]

Tab Stash is now part of Mozilla's Recommended Extensions program! Thank you to everyone who's helped make Tab Stash better—whether that's leaving a review, filing a bug report, or even sending in patches. It wouldn't have been possible without you!

Version 2.8.1
- Changed build parameters as requested by Mozilla.
- Fixed an issue loading settings that were set to invalid values (e.g. due to manual editing of the settings object).

Version 2.8

- New: The behavior of the Tab Stash button in your browser's toolbar can now be customized. Choose "Options..." from the Tab Stash menu to change the setting. [#21]
- New: Allow all URLs (except URLs to Tab Stash itself) to be stashed and restored. Privileged URLs which cannot be opened by Tab Stash will instead show an intermediate page to make it easy to open the URL manually. [#64]
- Improved: In the full-page UI, allow tabs to be dropped anywhere inside the folder box, not just immediately after the last tab in the list. [#101]
- Fixed: Occasionally, when Tab Stash is first installed, it may create two root "Tab Stash" folders, causing a warning in the UI. This can happen if the UI is opened before the extension has finished starting up. We now detect and remove the extra folder. [#103]

- New: The behavior of the Tab Stash button in your browser's toolbar can now be customized. Choose "Options..." from the Tab Stash menu to change the setting. [#21]
- New: Allow all URLs (except URLs to Tab Stash itself) to be stashed and restored. Privileged URLs which cannot be opened by Tab Stash will instead show an intermediate page to make it easy to open the URL manually. [#64]
- Improved: In the full-page UI, allow tabs to be dropped anywhere inside the folder box, not just immediately after the last tab in the list. [#101]
- Fixed: Occasionally, when Tab Stash is first installed, it may create two root "Tab Stash" folders, causing a warning in the UI. This can happen if the UI is opened before the extension has finished starting up. We now detect and remove the extra folder. [#103]

Version 2.7.1 hotfix:
- Fixed: During import, sites that take too long to load may be imported with missing titles and/or icons. We now wait longer, and measure time-to-load in a smarter way that is less likely to lead to premature timeouts.

Version 2.7:
- New: Tab Stash now remembers deleted items for a period of time (180 days by default). Deleted items are saved locally on each computer and can be found in the "Deleted Items" menu in the stash UI. [#20]
- New: A "close all stashed tabs" button was added to the "Unstashed Tabs" toolbar.
- Improved: The import and export dialogs have some additional help text and polishing to make them easier to use. [#67]
- Improved: The search box now sticks to the top of the page when you scroll, so it's always visible. [#69]
- Improved: The main menu icon has been changed to use a standard menu symbol, rather than the Tab Stash logo. [#71]
- Improved: Lots of "behind-the-scenes" changes have been made to improve general stability and prepare for upcoming features.
- Fixed: If Multi-Account Containers was installed and a URL set to auto-open in a container were imported, the import process would freeze. Import now works correctly with Multi-Account Containers and other Firefox tab-container extensions. [#91]

- New: Tab Stash now remembers deleted items for a period of time (180 days by default). Deleted items are saved locally on each computer and can be found in the "Deleted Items" menu in the stash UI. [#20]
- New: A "close all stashed tabs" button was added to the "Unstashed Tabs" toolbar.
- Improved: The import and export dialogs have some additional help text and polishing to make them easier to use. [#67]
- Improved: The search box now sticks to the top of the page when you scroll, so it's always visible. [#69]
- Improved: The main menu icon has been changed to use a standard menu symbol, rather than the Tab Stash logo. [#71]
- Improved: Lots of "behind-the-scenes" changes have been made to improve general stability and prepare for upcoming features.
- Fixed: If Multi-Account Containers was installed and a URL set to auto-open in a container were imported, the import process would freeze. Import now works correctly with Multi-Account Containers and other Firefox tab-container extensions. [#91]

- Added import and export for a variety of formats, including OneTab and Markdown. [#11, #17]
- Added a main menu with easy access to import/export, options, help, and a new command to fetch missing website icons.
- Improved caching of website icons. Icons are now stored per page, fixing incorrect icons for Google Drive and other sites which use multiple icons. Tab Stash now requires "unlimited local storage" permissions to ensure we have space to store all those icons. [#47]
- Fixed a rare issue that might cause Tab Stash to stop displaying your stashes if a Firefox sync conflict occurs, or a duplicate "Tab Stash" folder exists. We now detect situations that might lead to this problem and warn/guide you through resolving it. [#41, #49]

2.4

• Added support for stashing tabs which are in Reader View. Due to Firefox security restrictions, there are some caveats: [#24]
• The "Stash this tab" icon will not appear in the address bar for Reader View pages. You can instead use the right-click menu to stash individual Reader View tabs.
• Tab Stash cannot restore tabs directly to Reader View, so if a tab is no longer available (e.g. it was closed and removed from Firefox's cache), we will restore it to the normal website view.
• Added a record of which groups are visible and which are collapsed. If you collapse a group, we will now remember that, and we won't show you its contents again unless you ask (even if you restart your browser). [#2]
• Improved your privacy by replacing the Google icon service with a local cache of website icons. Note that some of your website icons will go missing until you visit the site and the cache can be populated—this is normal. [#3]
• Fixed an issue causing Tab Stash to mistakenly close a tab that was just opened if multiple tabs are restored in quick succession. [#25]
• Fixed an issue in which Tab Stash mistakenly allows stashing tabs with local files (file:///... URLs). Tab Stash cannot restore these tabs due to Firefox security restrictions, so we now treat them as system tabs which aren't stashable. [#27]
• Fixed an issue where some tabs would be restored to the wrong window if you quickly switch windows while a restore is happening. We will now ensure all tabs appear in the correct window even if it's no longer active. [#28]

2.3.1 - hotfix

• Fixed an issue preventing the sidebar from opening after stashing tabs when the (default) option "Automatically show your stashed tabs in the sidebar" is chosen. The tabs would get saved correctly, but you'd have no idea where they went because the sidebar wouldn't open.

2.3

• Added the ability to stash multiple selected tabs at once in Firefox 64 and newer. Just Ctrl/Cmd- or Shift-click on the tabs you want to stash, and then click any multi-stash button. [#6]
• Added the ability to manage collapsed groups in the sidebar. When you hover over a collapsed group, the group's "Stash..." and "Open..." buttons will now appear.
• Improved the ordering of context-menu items to put more commonly-used items first.
• Fixed a poor interaction between Tab Stash and Firefox Sync that would occasionally cause stashed tabs to get mis-filed so they no longer appear in the stash. To recover any missing tabs, see: [#8]
• Fixed an issue where the "Close all open tabs" button wasn't respecting the "hide" vs. "close" stashed tabs setting.

* Fixed an issue preventing Tab Stash from closing hidden tabs associated with bookmarks that were deleted from the stash.
* Fixed an issue preventing Tab Stash from unloading old hidden tabs correctly.
* Fixed an issue preventing Tab Stash from automatically deleting empty folders in the stash.
* Fixed an issue where the option to close instead of hide stashed tabs wasn't being respected. [#4]
* Fixed an issue that in some cases would cause the stash list to become unresponsive after restoring a tab that was recently closed.

- Added options to control whether tabs are hidden or closed when they are stashed.
- Added advanced options to adjust how aggressively Tab Stash unloads hidden tabs that haven't been used recently.
- Improved the styling of collapsed groups in the tab view, to make them more visually-distinct from folders that are not collapsed.
- Fixed a conflict with keyboard shortcuts on Windows and Linux. The new keyboard shortcuts are as follows:
+ Show stashed tabs in sidebar: Ctrl+Alt+S
+ Stash all open tabs: Ctrl+Alt+T
+ Stash the active tab: Ctrl+Alt+W
- Fixed an issue where the search box wouldn't fit inside the sidebar if the sidebar was really narrow.

- Added a "What's New?" page and prep work for unobtrusive notifications to let users know when new features are available.
- Fixed an issue where the sidebar may not open automatically when stashing tabs.
- Fixed an issue that prevents the list of unstashed tabs from updating when a tab is torn off into a new window.

If you don't see your issue here, don't worry--it hasn't gotten lost! More fixes and improvements are in the works.

- Added a new "stashed tabs" tab which presents your stash in a full-window, multi-column view.
- Added a preference to choose whether to automatically open the sidebar or the tab view when stashing tabs.
- Added a search box. Search your stash by clicking on the "Search ..." label at the top of the stash view.
- Re-open stashed tabs and groups in the background by Ctrl+ or Cmd+clicking the tab/folder
- Bug fix: Allow stashing of pinned tabs if explicitly requested (by clicking a "Stash This Tab" button)
- Minor aesthetic improvements to the stashed-tabs view

Various bug fixes, mostly pertaining to display or updating issues in the "Stashed Tabs" sidebar.