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  • Greasemonkey

    Other
    Rated 4 out of 5 stars (933)
    Customize the way a web page displays or behaves, by using small bits of JavaScript.
    1,368,076 users
  • Flashblock

    Other
    Rated 4 out of 5 stars (1,115)
    Never be annoyed by a Flash animation again! Blocks Flash so it won't get in your way, but if you want to see it, just click on...
    881,297 users
  • EPUBReader

    Other
    Rated 5 out of 5 stars (154)
    With EPUBReader you can read ePub files just in Firefox. No additional software needed!
    479,960 users
  • Garmin Communicator

    Other
    Rated 3 out of 5 stars (26)
    The Garmin Communicator is an internet browser plugin that allows you to easily transfer data between websites and Garmin GPS devices.
    375,301 users
  • Session Manager

    Other
    Rated 4 out of 5 stars (528)
    Session Manager saves and restores the state of all or some windows - either when you want it or automatically at startup and after crashes. It can also automatically save the state of open windows individually.
    282,542 users
  • Mozilla Firefox hotfix

    Other
    Rated 5 out of 5 stars (1)
    This official add-on enables Firefox to provide quick fixes for selected issues.
    155,651 users
  • Memory Fox

    Other
    Rated 4 out of 5 stars (316)
    Attempting to reduce both Browser and Flash RAM Memory usage. Memory Fox will promote the increase of available RAM memories for other application processes. Hopefully, fostering any attempts of Memory Recovery and Retention.
    142,733 users
  • Toolbar Buttons

    Other
    Rated 4 out of 5 stars (320)
    Adds toolbar buttons to the customize toolbar window in several programs including Firefox, Thunderbird and SeaMonkey. Some of the buttons make commonly preformed actions quicker, others add new functionality.
    138,386 users
  • wmlbrowser

    Other
    Rated 4 out of 5 stars (27)
    Simulate WAP browsing by viewing WML (Wireless Markup Language) pages.
    109,935 users
  • Help make Firefox better. The Add-on Compatibility Reporter enables you to report if the Firefox add-ons that you're using are working properly.
    99,481 users
  • UnMHT

    Other
    Rated 5 out of 5 stars (198)
    UnMHT allows you to view MHT (MHTML) web archive format files, and save complete web pages, including text and graphics, into a single MHT file in Firefox/SeaMonkey.
    90,495 users
  • Translate This!

    Other
    Rated 4 out of 5 stars (76)
    Translate the whole entire page or just a selection using Google Translate.
    88,557 users
  • LeechBlock

    Other
    Rated 5 out of 5 stars (475)
    LeechBlock is a simple productivity tool designed to block those time-wasting sites that can suck the life out of your working day. All you need to do is specify which sites to block and when to block them.
    84,480 users
  • Save as PDF

    Other
    Rated 3 out of 5 stars (101)
    Lets you download web pages as PDF in one click.
    74,068 users
  • Low Quality Flash

    Other
    Rated 4 out of 5 stars (48)
    Sets Flash objects to "Low Quality" to improve performance on slower platforms (i.e. older computers, netbooks, and Firefox Mobile).
    61,692 users
  • Secure Login

    Other
    Rated 4 out of 5 stars (362)
    Secure Login is an extension for Firefox integrated password manager.
    61,208 users
  • Image Block

    Other
    Rated 4 out of 5 stars (117)
    Image Block adds a toggle button that conditionally blocks/allows loading of images on webpages. Blocking images results in faster browsing, especially helpful on handheld devices or slower connections like GSM/GPRS/EDGE dial-up etc.
    53,026 users
  • Proxy Selector

    Other
    Rated 4 out of 5 stars (103)
    Proxy Selector lets you switch local proxies in Firefox.
    44,713 users

Top Rated See all »

  • Disable Ctrl-Q Shortcut

    Other
    Rated 5 out of 5 stars (43)
    Never close the browser by mistake again.
    3,460 users
  • Copy Plain Text 2

    Other
    Rated 5 out of 5 stars (55)
    Copies text without formatting
    36,619 users
  • Restart

    Other
    Rated 5 out of 5 stars (28)
    "Restart" menu and button, with configurable shortcut key.
    10,635 users
  • Show My Password

    Other
    Rated 5 out of 5 stars (69)
    You are annoyed because your password fields are always scrambled though nobody else but you can see the screen? This most advanced unscrambling addon shows your passwords in readable letters, while being fully customizable to fit your needs.
    35,187 users
  • Add more items to Add-ons Manager context menu.
    9,872 users
  • Baidu Tieba Harmonizer

    Other
    Rated 5 out of 5 stars (16)
    A simple tool designed to circumvent Baidu Tieba's censorship.
    14 users
  • CheckBoxMate

    Other
    Rated 5 out of 5 stars (83)
    Check multiple checkboxes with ease by drawing a box around them to automatically select them all.
    189 users
  • Better HKGolden

    Other
    Rated 5 out of 5 stars (68)
    Improve HKGolden Forum, including layout cleanup and advertisements removal
    329 users
  • A Bit Better RTM

    Other
    Rated 5 out of 5 stars (32)
    Small improvements for Remember The Milk interface (original greasemonkey script "A Bit Better RTM" - http://userscripts.org/scripts/show/32518)
    1,217 users
  • Addons Manager Hilite

    Other
    Rated 5 out of 5 stars (18)
    Remembers last selected (hilited) extension/theme/plugin/userstyle in Add-ons Manager. Turn off/on the add-on selection list box and/or fine tune behavior via its Options.
    924 users
  • ModMovil Extension

    Other
    Rated 5 out of 5 stars (11)
    Este plugin está pensado y diseñado para facilitar la navegabilidad por el foro modmovil.com; de manera tal que el foro este accesible a un simple click de distancia.
    2 users
  • Sun Cult

    Other
    Rated 5 out of 5 stars (115)
    Worldwide Sunrise, Sunset, Twilight, Moonrise and Moonset...
    6,867 users
  • TED the Toolbar

    Other
    Rated 5 out of 5 stars (14)
    A toolbar to monitor your real-time electric use. Requires TED, the Energy Detective and TED Footprints API, products of Energy, Inc. The toolbar now supports both the TED 1000 and 5000 series energy monitors.
    279 users
  • uc

    Other
    Rated 5 out of 5 stars (17)
    A userChromeJS clone with built-in subscript/overlay loader capability.
    910 users
  • bioFOX

    Other
    Rated 5 out of 5 stars (20)
    Bioinformatics tools on Mozilla based browsers
    694 users
  • Version in Add-on bar

    Other
    Rated 5 out of 5 stars (10)
    Show the Firefox/Thunderbird version number in the addon bar (formerly called status bar).
    703 users
  • Cards

    Other
    Rated 5 out of 5 stars (64)
    A collection of patience (i.e. single-player) card games. Included are: Aces Up, Black Widow, Canfield, Demon, Double Klondike, Double Solitaire, Grounds for Divorce, Fan, Forty Thieves, FreeCell, Golf, Gypsy, Klondike, Maze, Mod 3, Montana...
    682 users
  • Extension Auto-Installer

    Other
    Rated 5 out of 5 stars (12)
    Extension Auto-Installer is a helper for Firefox/SeaMonkey/Thunderbird extension developers: it allows automatically adding or updating browser extensions, e.g. via command line tools. This makes testing your changes easier.
    3,855 users

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See all 1632 extensions in Other »