Mozilla Firefox Plugins, Add-ons and extension Page 20 of 72

Browse 1,795 Mozilla Firefox Plugins, Add-ons and extension on AlternativeTo.

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  1. Rango icon
     2 likes

    Rango is a cross browser extension that helps you interact with web pages using your voice and talon. It does this by drawing hints with letters next to elements that you can use to click, hover, copy or show link addresses.

    Cost / License

    • Free
    • Open Source (MIT)

    Platforms

    • Firefox
    • Google Chrome
    • Microsoft Edge
    Rango screenshot 1
    Rango screenshot 1
    Rango screenshot 2
    +1
    Rango screenshot 3
    1 alternatives
  2. 10015.io icon
     4 likes

    10015.io serves as an extensive digital toolbox, providing a wide range of tools accessible from a single online platform. It is designed with the objective of streamlining tasks across numerous categories via an elegant and intuitive interface.

    Cost / License

    • Free
    • Proprietary

    Platforms

    • Online
    • Google Chrome
    • Firefox
    All Online Tools in One Box
    Categories
    10015.io screenshot 2
    +1
    10015.io screenshot 3
    35 alternatives
  3. SideHN icon
     1 like

    The web, with a side of HackerNews. Shows a sidebar with HN comments if the link was opened from HN.

    Cost / License

    Application type

    Platforms

    • Google Chrome
    • Firefox
    SideHN screenshot 1
    SideHN screenshot 1
    SideHN screenshot 2
    +1
    SideHN screenshot 3
    19 alternatives
  4. Analyze chess position from any website, image or video.

    Cost / License

    • Freemium
    • Proprietary

    Application type

    Platforms

    • Online
    • Android
    • iPhone
    • Android Tablet
    • iPad
    • Discord
    • Google Chrome
    • Reddit
    • Firefox
    Chessvision.ai screenshot 1
    Position from a video
    Puzzle from a website
    +1
    Position from a book
    8 alternatives
  5. Byepass icon
     1 like

    ByePass is a password manager that provides secure online transactions and password management across multiple devices. It uses local data encryption to store passwords and credit card information securely, only retrieving them when needed to minimize exposure.

    Cost / License

    • Freemium
    • Proprietary

    Application type

    Platforms

    • Mac
    • Windows
    • Android
    • iPhone
    • Android Tablet
    • iPad
    • Microsoft Edge
    • Google Chrome
    • Mozilla Firefox
    • Android Wear
    Byepass screenshot 1
    Byepass screenshot 1
    Byepass screenshot 2
    +2
    Byepass screenshot 3
    56 alternatives
  6. Vocabla icon
     15 likes

    Vocabla is an app for building your English vocabulary.

    It can help you learn 300+ English words/month.

    How it works: New English word? Add it to Vocabla. Memorize it.

    Product features:

    • English word translations
    • Intelligent and easy tests
    • Lists to help you organize yo.

    Cost / License

    • Freemium
    • Proprietary

    Platforms

    • Online
    • Android
    • iPhone
    • Chrome OS
    • Android Tablet
    • iPad
    • Google Chrome
    • Kindle Fire
    • Firefox
    Vocabla screenshot 1
    Vocabla screenshot 1
    Vocabla screenshot 2
    105 alternatives
  7. Detect when your installed Chrome extensions have changed owners.

    Cost / License

    • Free
    • Open Source (MIT)

    Platforms

    • Google Chrome
    • Firefox
    Under New Management screenshot 1
  8. This add-on protects you from sites that automatically play loud/annoying sounds by muting all sites that aren't specified in a whitelist.

    Cost / License

    • Free
    • Proprietary

    Platforms

    • Mozilla Firefox
    Mute Sites By Default screenshot 1
  9. 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.

    Cost / License

    • Free
    • Open Source

    Application type

    Alerts

    • Discontinued

    Platforms

    • Windows
    • Google Chrome
    • Mozilla Firefox
    Dark Night Mode screenshot 1
    Dark Night Mode screenshot 1
    Dark Night Mode screenshot 2
    18 alternatives
  10. RequestPolicy icon
     33 likes

    RequestPolicy is an extension for Mozilla browsers that improves the privacy and security of your browsing by giving you control over when cross-site requests are allowed by webpages you visit.

    Cost / License

    • Free
    • Open Source

    Alerts

    • Discontinued

    Platforms

    • Firefox
    • SeaMonkey
    RequestPolicy screenshot 1
    RequestPolicy screenshot 1
    RequestPolicy screenshot 2
    15 alternatives
  11. TwitchNoSub icon
     3 likes

    Be able to watch any sub-only vod on Twitch, integrated in the website and support every twitch features.

    Cost / License

    Platforms

    • Google Chrome
    • Twitch
    • Mozilla Firefox
    TwitchNoSub screenshot 1
    1 alternatives
  12. Saladict icon
     8 likes

    Saladict is a professional inline translator browser extension, built for comparative reading, with comprehensive dictionaries covering all major languages.

    Cost / License

    • Free
    • Open Source (MIT)

    Platforms

    • Online
    • Chrome OS
    • Google Chrome
    • Firefox
    Saladict screenshot 1
    Saladict screenshot 1
    Saladict screenshot 2
    +4
    Saladict screenshot 3
    110 alternatives
  13. CookieMaster icon
     1 like

    In a similar style to the old pre-WebExtensions CookieMonster plugin, CookieMaster allows you to control which sites are allowed to set cookies, focusing mainly on first party cookies.

    Cost / License

    • Free
    • Open Source

    Platforms

    • Mozilla Firefox
    CookieMaster screenshot 1
    CookieMaster screenshot 1
    CookieMaster screenshot 2
    1 alternatives
  14. InsensitiveX icon
     1 like

    This extension allows watching sensitive media on X (formely known as Twitter) for all accounts without providing a selfie or a government ID.

    Cost / License

    • Free
    • Proprietary

    Platforms

    • Mozilla Firefox
    • Google Chrome
    InsensitiveX screenshot 1
  15. heylogin icon
     3 likes

    heylogin is the first password manager with full hardware-based end-to-end encryption. 2-factor secure by default, developed and hosted in Germany.

    Cost / License

    • Freemium
    • Proprietary

    Application type

    Platforms

    • Online
    • Android
    • iPhone
    • iPad
    • Microsoft Edge
    • Google Chrome
    • Safari
    • Mozilla Firefox
    heylogin screenshot 1
    heylogin screenshot 1
    heylogin screenshot 2
    +3
    heylogin screenshot 3
    17 alternatives
  16. ekoru icon
     2 likes

    Search engine that fights climate change. 60% of revenue each month goes to climate change charities involved in animal welfare, reforestation, ocean conservation, and climate action.

    Cost / License

    • Free
    • Proprietary

    Application type

    Platforms

    • Online
    • Google Chrome
    • Firefox
    ekoru screenshot 1
    ekoru screenshot 1
    ekoru screenshot 2
    +6
    ekoru screenshot 3
    67 alternatives
  17. Popup Blocker (strict) is a lightweight extension to prevent websites from opening popups. The extension pauses all sort of window opening requests for user attention. You can either accept or deny a request. Multiple unique requests are shown in an array.

    Cost / License

    • Free
    • Open Source

    Platforms

    • Mac
    • Windows
    • Linux
    • Android
    • Google Chrome
    • Opera
    • Firefox
    Popup Blocker (strict) screenshot 1
    6 alternatives
  18. No, thanks. icon
     2 likes

    Browser extension that blocks newsletter pop-ups, Chat boxes, "Install our app" toolbars, "Allow notifications" pop-ups, Let us know your location" pop-ups, Survey and opinion pop-ups, Sticky video boxes in the corner and more.

    Cost / License

    • Paid
    • Proprietary

    Application type

    Platforms

    • Mac
    • Windows
    • Linux
    • Chrome OS
    • Google Chrome
    • Firefox
    11 alternatives