Add-ons
To try the thousands of add-ons available here, download Mozilla Firefox, a fast, free way to surf the Web!
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Choose from thousands of extra features and styles to make Firefox your own.
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CuteButtons
Compact Menu 2
Requires Restart
Add a compact menu button to the navigation toolbar, and hide the menu bar.
No need flash plugin on embeded youtube movies
No need flash plugin on embeded youtube movies
System Monitor
Requires Restart
Provides CPU usage and memory usage graphs on the toolbar.
Browser Backgrounds
Requires Restart
Browser Backgrounds is the new Firefox extension that lets you install backgrounds directly on your browser.
Markdown Viewer
Requires Restart
Markdown document viewer.
Allows to visualize formatted markdown documents in browser.
ViewAbout
Requires Restart
Enables access to various about: dialogs from the View menu.
FLST (Firefox 4+)
Requires Restart
Provides Focus Last Selected Tab and Tab flipping functionality (based on the FLST extensions by Gorgias and Gozer, but ported to Firefox 4/.../56 and repaired Tab flipping functionality). Enjoy!
HTitle (discontinued)
Requires Restart
Hide title bar if window is maximized.
This add-on has been discontinued!
Legacy extensions support will be dropped in Firefox 57. If you interest in CSD on Linux, please track progress on https://bugzilla.mozilla.org/show_bug.cgi?id=1283299.
Menu Editor II
Requires Restart
Hides or moves menus and menu items. (Deprecated version, see below.)
URLFilter
bosskey
Requires Restart
Add Boss Key, Minimize/Close to tray and memory auto cleaning to Firefox.
Hide Menubar
Requires Restart
Supports to hide Menu Bar automatically, you can press the ALT key to show it temporarily.
Noia Fox options
Requires Restart
Options manager and fixes for Noia Fox theme 3.x.x
Colorific
Colorize entire web pages. Configure themes using sliders and drag-and-drop. Set domain preferences for automatic coloration.
xultray for gecko 1.9.1
Requires Restart
Show xul application (gecko 1.9.1 based) in system tray. supports Firefox 3.5, Thunderbird 3.0.
xultray for gecko 1.9.2
Requires Restart
Show xul application (gecko 1.9.2 based) in system tray. supports Firefox 3.6 / 3.7 , Thunderbird 3.1
KeePass Helper
Requires Restart
Adds a hostname, URL, or email account ID to the application's window name (e.g., that of Firefox or Thunderbird) to make it recognizable to password manager utilities like KeePass.
Stylish Tools
Requires Restart
Quicker access to several Stylish features through a toolbar button and/or keyboard shortcuts. Available for Firefox, Thunderbird, and SeaMonkey
Column Reader
Web reader for wide screens and long documents. Read with pleasure in attractive layouts.
To create your own collections, you must have a Mozilla Add-ons account.
