Classic Theme Restorer Requires Restart
Australis was the code name for the current Firefox theme, it aimed to make a great browser look awesome. Now you can go one step further and also make it feel awesome to use!
Tab Groups are an easy way to organize a lot of tabs. You can visually group related tabs, switch between groups, and quickly search through all of your tabs to switch to a specific one.
Short, Vim-style keyboard shortcuts for browsing and navigation, for a near mouseless experience.
Restrict Proxy by Private Windows, Tabs and Domain List
An add-on that allows colouring Firefox in a Vivaldi style fashion.
Port in progress for Firefox 57.
Simply adds "Duplicate Tab" to tab context menu.
Right Links Requires Restart
This extension allows to open links in new tabs with right-click directly and using “long” left-click.
This is very useful for touchpads on notebooks and for mice without middle button.
Tab Groups Helper Requires Restart
Create and manage tab groups in a side-by-side list-view interface, or "Groups Bar" toolbar interface. Single or multi-tab close, bookmark, or move across groups. Search for tabs by title or content in current or all groups. Much more...
Adds private tabs.
Tile Tabs Requires Restart
Displays tabs in tiled layouts in Firefox. Arrange tiles horizontally, vertically or in a grid. Resize tiles by dragging splitter bars. Tabs and links can be dragged to open in other tiles. Supports multiple tiled layouts. Works with tab groups.
All Tabs Helper Requires Restart
Transforms "List all tabs" menu to do closing, loading, unloading, moving of single/multiple tabs. Search tab titles or *content* (remember "Find In Tabs"?), visited tabs history, find duplicate tabs - very helpful for mega-tab users. And more...
Switch to Tab no more Requires Restart
Disables the Switch to Tab function.
Send Link in context menu Requires Restart
Add Send Link back into context menu. This item was removed in Firefox 16.
Double-click action for Firefox -
double-click Link, Bookmark/History to open in new tab (emulate ctrl+click).
UsableHomeButton Requires Restart
Allows to go to home page (domain root) of any currently opened website via the “Home” button of the browser.
Open new tabs always to the right of the current one.
View Page Source in New Tab, Current Tab or New Window
New Tab Override brings back the ability to change the page which is shown when opening a new tab.
Print Edit Requires Restart
Allows editing of web page content while in Print Preview mode, prior to printing or saving as HTML or PDF. Compacts the layout and removes unwanted content such as adverts, sidebars and blank pages. Any element can be formatted, hidden or deleted.