Automatically refresh tabs based on custom time intervals
ReloadMatic automates the periodic reloading / refreshing of browser tabs. It offers cache control, custom intervals, POST support and many other features. It also integrates with browser features such as tab restore, pinning, and incognito mode.
Firefox Multi-Account Containers lets you keep parts of your online life separated into color-coded tabs that preserve your privacy. Cookies are separated by container, allowing you to use the web with multiple identities or accounts simultaneously.
Show tabs like a tree.
Squared tabs, application button menu, add-on bar, small button view, old search and many more 'old' features for 'Firefox 29-56' only, not for Firefox Quantum (57+)! >Latest builds only on Github!<
Play game Flappy Bird when you open a new tab. Try to fly the bird as far as you can without hitting a pipe!
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.
Download video from any Youtube video in High definition HD.
Open a mobile view of a page in the sidebar
You can capture a screen shot by selecting an area or capture the whole/visible webpage. Then edit and save it as an image file.
Limits the number of tabs that can be open in a session