Move your tabs to the side of your browser window.
An add-on that allows colouring Firefox in a Vivaldi style fashion.
Show tabs like a tree.
Edit the contents of a web page prior to printing or saving. Elements in the web page can be edited, formatted, hidden or deleted. Unwanted content, such as adverts and sidebars, can easily be removed.
Squared tabs, application menu, add-on bar, small button view and many more 'old' features for 'Firefox 29-56', not for Firefox 57+! Release builds Beta builds
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.
Simply adds "Duplicate Tab" to tab context menu.
Experience a beautiful image from Google Earth every time you open a new tab.
Use native tab discard method to automatically reduce memory usage of inactive tabs
Snooze Tabs help you focus your attention online, whether you want to remove distractions for now or save something for later. Hit the snooze icon to dismiss tabs you don’t want now, and set an alarm to bring them back when you need them.
Save sessions as bookmarks and sync them through Firefox Sync. Advanced Session Manager: edit, save, change, restore. But it's can also be your best Bookmark Manager