The entire page will be fading to dark, so you can watch the videos as if you were in the cinema. Works for YouTube™ and Beyond. It works for all known video sites such as YouTube, Vimeo, Twitch, Dailymotion, Facebook, Hulu, Metacafe, YouKu, etc.
Show tabs like a tree.
Expand your email area by blocking and removing ads on the right hand side of the screen when using Gmail, Hotmail, Outlook.com and Yahoo Mail.
Dark YouTube theme - apply Black Youtube & Facebook Skin. Dark YouTube theme protects eyes by changing Youtube & FB colors to black
Squared tabs, application menu, add-on bar, small button view and many more 'old' features for 'Firefox 29-56', not for Firefox 57+! Latest builds on Github! AMO is dead.
'Classic Toolbar Buttons' add-on restores old toolbar button ui (known from Fx 4-7s small view, Fx 4-12s large view & Tb 5-14) for current Firefox, Thunderbird and Seamonkey versions. Beta builds on versions page!
Bring your bookmarks into view with just a gesture. Move the sidebar across the screen. Open a different sidebar by just clicking its title. And more! Keeps your sidebar simple and quick to access!
Short, Vim-style keyboard shortcuts for browsing and navigation, for a near mouseless experience.
Native Dark mainly replaces the default themes of Firefox, because the light theme was adaptive in the titlebar and not the tabs. It allows for the same adaptive titlebar as the default light theme but combines the aesthetic of the dark theme's tabs.
It is a universal night mode for the entire Internet. It uses a special algorithm to automatically change the colors of the websites you visit into dark mode so that you can browse without straining your eyes, especially at night.
Customise the App Button.
Gives a possibility to create custom toolbarbuttons...