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Undo Close Tab Replacement

Replaces the "Undo Close Tab" menu item with the "Recently Closed Tabs" submenu.

Rated 5 out of 5 stars (34)
1,877 users

Customize about:newtab Requires Restart

Since version 13, Firefox has the new about:newtab page, which is great...but you can't change the background! This addon solves that.
Now you can change the background color and/or choose an image.

Rated 5 out of 5 stars (59)
8,247 users

Context Search Requires Restart

Expands the context menu's 'Search for' item into a list of installed search engines, allowing you to choose the engine you want to use for each search.

Rated 5 out of 5 stars (276)
37,215 users

Prevent Tab Overflow Featured

Make sure your tabs stay visible all the time.

Rated 5 out of 5 stars (65)
11,109 users

bug489729 (Disable detach and tear off tab) Requires Restart

Workaround: Bug 489729 - Clicking a tab once and then moving your mouse in a downward motion causes a new window to open.

Optionally(If you want):
Disable detach tab completery, Enable to create Shortcut on the desctop/explorer.

Rated 5 out of 5 stars (121)
4,853 users

Standalone

NOTE: THIS ADD-ON NO LONGER WORKS AS OF FIREFOX 48.

Click the rocket icon on the add-on bar to turn the current tab into a desktop app. In Mac, the app shows up in your Applications folder, for example. EXPERIMENTAL.

Rated 5 out of 5 stars (25)
510 users

Replacetabs Extension Requires Restart

Make 'Open in Tabs' replace existing tabs, like it was in Firefox 2.

Rated 5 out of 5 stars (22)
88 users

Stratiform Requires Restart

Stratiform is the ultimate user friendly customization add-on for Firefox. It puts the power in the average user's hands to customize the browser's look.

Rated 5 out of 5 stars (179)
4,235 users

Tab Utilities Lite Requires Restart

Open Bookmarks/History/Homepage/URL/Search in new tabs, and more utilities for tabbed browsing. This is a lite version of Tab Utilities (http://addons.mozilla.org/addon/59961).

Rated 5 out of 5 stars (86)
1,568 users

History Submenus II Featured

Add sub-menus to History Menu for previous days' history.

Rated 5 out of 5 stars (49)
4,306 users

Hide Caption Titlebar Plus

"Maximize your screen space by adjusting Firefox window TitleBar, borders, Tabs, Toolbars, etc!", with 'smart' options, *optional* custom caption & resizers.  
Multiple Configurable Actions for both screen-corner buttons: Firefox & Close buttons!

Rated 5 out of 5 stars (444)
27,860 users

MuteLinks

Mute Tabs based of URL.

Rated 5 out of 5 stars (10)
579 users

Location Bar Enhancer

Changes the Location Bar of Firefox into a Breadcrumb display with rich and interactive features.

Rated 5 out of 5 stars (184)
10,459 users

Session Exporter Requires Restart

Exports Firefox sessions to HTML files or saves them to your bookmarks. If your session includes tab groups, your tabs are grouped accordingly.

Rated 5 out of 5 stars (10)
3,065 users

Tab Groups Button

Widget and toolbar for panorama

Rated 5 out of 5 stars (25)
845 users

Close Other Tabs By Double-Click

Close other tabs by double-clicking the one you want to keep

Rated 5 out of 5 stars (14)
274 users

TabTrekker - New Tab Page

Explore the world one tab at a time.

Rated 5 out of 5 stars (69)
4,078 users

Overlay Scrollbars

Overlay Scrollbars for Firefox.

Rated 5 out of 5 stars (14)
455 users

Copy Urls Expert Requires Restart

Copy multiple urls (links) to clipboard. Provides options to copy urls of all opened tabs and urls in selected text. You can customize the format of copied urls. You can also open multiple links from clipboard.

Rated 5 out of 5 stars (81)
75,940 users

switch-to-tab Blacklist

Blacklist some websites from showing up in Firefox 4's new switch-to-tab feature.

Rated 5 out of 5 stars (18)
214 users