An efficient cookie manager. View, edit, delete and search for cookies. Supports private mode and Firefox mobile too. Designed for privacy and security aware users. Enable this extension to open the cookie manager, disable it if you are done.
Removes the annoying link-conversion at Google Search / maps / ...
Instant lyrics on YouTube, Spotify, Deezer, 8tracks, SoundCloud and many other music sites in a flexible panel. 40+ sources ensure that lyrics are always found. Simple to use and highly customizable. (formerly called "YouTube Lyrics by Rob W")
Offers the possibility to display documents in the browser window.
Overrides the Ctrl-Q and Command-Q shortcut so that you cannot accidentally quit Firefox. To quit anyway, use the 'Quit Firefox' menu item. This add-on works on Windows/macOS and also in private browsing mode. For Linux, read the description.
View source code of Firefox add-ons and Chrome extensions (crx/nex/xpi) from addons.mozilla.org, the Chrome Webstore and elsewhere.
Request websites over secure https by default from the location bar instead of insecure http.
Displays anchors for all content in the current web page without breaking the layout.
Stop videos on YouTube from playing automatically until an explicit user gesture (clicking or pressing a key).
Real-time desktop notifications for Stack Exchange's inbox.