For those that have smart TV's and use the great TubeCast application available on Windows 10.
OneTab - Too many tabs? Convert tabs to a list and reduce browser memory
Open multiple addresses at once
Super Start Requires Restart
Just another speed dial extension. Fast and easy to use.
Private Tab Featured
Adds private tabs.
Select a number of links with a rectangle and open them all in new tabs in the same or a new window(s), download them or copy them to the clipboard. You can also lasso checkboxes to quickly check or uncheck them.
Short, Vim-style keyboard shortcuts for browsing and navigation, for a near mouseless experience.
Smart HTTPS Featured
Automatically changes HTTP addresses to the secure HTTPS, and if loading encounters error, reverts it back to HTTP.
Beyond Australis Featured
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!
IE Tab + (FF 8+, 7, 6, 5, 4, 3.6, 3.5, SeaMonkey) Requires Restart
IE Tab + is an enhanced version of IE Tab. It supports FF 3.5 or greater, integrates IE Tab with Adblock Plus in the IE Tab engine, and synchronizes cookies between IE and Firefox. You can easily import settings from the original IE Tab into IE Tab +
A global dark theme for the web
Automatically refresh tabs based on custom time intervals
Live new tab page: living photos in your browser, weather, to-do list, and bookmark tiles
"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!
Multi Links Plus Requires Restart
Multi Links Plus lets you open, copy or bookmark multiple links at the same time rather than having to do them all individually.
Tab Memory Usage Featured
Tab Memory Usage displays the amount of memory is used by each tab
Open With Google Chrome sends pages from Mozilla Firefox to Google Chrome.
Tab Tree shows your tabs in the form of a tree structure. And also makes the user interface compact (optionally) to allow more space for the Web.