Explore powerful tools and features to customize Firefox and make the browser all your own.
An easy-to-use font inspector to get CSS styles of the selected element
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.
YouTube with more freedom
Automatically find and try coupon codes with 1-click. Works at thousands of stores in the US, Canada, Australia, India and the UK.
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!<
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.
Play game Flappy Bird when you open a new tab. Try to fly the bird as far as you can without hitting a pipe!
Ad Blocking, remastered. Incognito Adblocker took all of the best ad blocking and privacy protection features you’d expect in an adblocker extension and advanced them to create the best adblock extension yet.
Run Instagram on Desktop just like your favorite mobile app. Enjoy the most beautiful Instagram Web client. ★ turn on Instagram Night mode ★ download stories and photos ★ upload from your PC or Mac
List addons in Windows' "Add or Remove Programs".
Adblocker Features: + Adblocker on every Youtube Video + Malware- and Adblocker. + Performance enhancement in browsing speed. + Adblocker of ads, banners and pre-rolls on Youtube. + No more Banner, PopUp, PopUnder + INSTALL ADBLOCKER
Provides ability to disable "about:*" pages by the configuration.