Mozilla Firefox Plugins, Add-ons and extension Page 3 of 72

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  1. TinEye icon
     271 likes

    Efficient reverse image search engine that identifies exact usages and altered images online, provides source information, and ensures ad-free, lightweight experience.

    Cost / License

    • Free Personal
    • Proprietary

    Application type

    Platforms

    • Online
    • Microsoft Edge
    • Google Chrome
    • Opera
    • Mozilla Firefox
    TinEye screenshot 1
    TinEye screenshot 1
    TinEye screenshot 2
    49 alternatives
  2. Instapaper icon
     244 likes

    Save web pages for offline reading, organize long articles and blog posts, enjoy distraction-free mode, and sync content across devices with text-to-speech support.

    Cost / License

    • Freemium
    • Proprietary

    Application type

    Platforms

    • Mac
    • Online
    • Android
    • iPhone
    • Android Tablet
    • iPad
    • Apple Watch
    • Google Chrome
    • Kindle Fire
    • Software as a Service (SaaS)
    • Mozilla Firefox
    Instapaper screenshot 1
    Instapaper screenshot 1
    Instapaper screenshot 2
    +1
    Instapaper screenshot 3
    113 alternatives
    3.4
    Fair8 reviews
  3. Decentraleyes icon
     144 likes

    Protects you against tracking through "free", centralized, content delivery. It prevents a lot of requests from reaching networks like Google Hosted Libraries, and serves local files to keep sites from breaking. Complements regular content blockers.

    Cost / License

    • Free
    • Open Source

    Platforms

    • Mac
    • Windows
    • Linux
    • Android
    • Android Tablet
    • Google Chrome
    • Pale Moon
    • Opera
    • Chromium
    • Mozilla Firefox
    Decentraleyes screenshot 1
    Decentraleyes screenshot 1
    4 alternatives
  4. TickTick icon
     210 likes

    Manage time efficiently, organize tasks with lists and tags, and set priorities. Share task lists, attach files, and use collaboration tools.

    Cost / License

    • Freemium
    • Proprietary

    Platforms

    • Mac
    • Windows
    • Linux
    • Online
    • Android
    • iPhone
    • Chrome OS
    • Android Tablet
    • iPad
    • Apple Watch
    • Google Chrome
    • Android Wear
    • Mozilla Firefox
    TickTick screenshot 1
    TickTick screenshot 1
    TickTick screenshot 2
    +1
    TickTick screenshot 3
    3.7
    Good26 reviews
  5. HTTPS Everywhere icon
     358 likes

    HTTPS Everywhere is a browser extension produced as a collaboration between The Tor Project and the Electronic Frontier Foundation. It encrypts your communications with a number of major websites.

    Cost / License

    • Free
    • Open Source

    Application type

    Alerts

    • Discontinued

    Platforms

    • Online
    • Vivaldi Browser
    • Google Chrome
    • Yandex.Browser
    • Opera
    • Chromium
    • Firefox
    HTTPS Everywhere screenshot 1
    HTTPS Everywhere screenshot 1
    HTTPS Everywhere screenshot 2
    +1
    HTTPS Everywhere screenshot 3
    9 alternatives
  6. Koofr icon
     142 likes

    Koofr is a safe, secure and simple way to store, backup and share your documents, photos, videos and more. It offers up to 10 GB of free safe storage for your files with affordable upgrades and options to connect multiple cloud accounts.

    Cost / License

    • Freemium
    • Open Source (MIT)

    Platforms

    • Mac
    • Linux
    • Online
    • Android
    • iPhone
    • Android Tablet
    • Windows Phone
    • iPad
    • Linux Mobile
    • Google Chrome
    • Rust
    • F-Droid
    • Software as a Service (SaaS)
    • Docker
    • Chromium
    • Mozilla Firefox
    Koofr web app
    Koofr mobile app
    Koofr mobile app
    +3
    Koofr mobile app
    192 alternatives
    4.6
    Excellent12 reviews
  7. Curio icon
     27 likes

    Save web links and email newsletters, add notes and highlights, tag and favorite articles, and read distraction-free in a Markdown viewer online or offline.

    Cost / License

    Platforms

    • Online
    • Self-Hosted
    • Google Chrome
    • Docker
    • Mozilla Firefox
    • Android
    • iPhone
    Dashboard on mobile
    Reader view on mobile
    User guide on mobile
    +5
    Reader view with sidebar on mobile
    68 alternatives
  8. Eagle  icon
     101 likes

    Cross-platform tool for collecting, searching, and organizing images, videos, audio, and fonts with advanced tags, smart folders, and color filters for creative asset management.

    Cost / License

    • Paid
    • Proprietary

    Platforms

    • Mac
    • Windows
    • Microsoft Edge
    • Google Chrome
    • Safari
    • Mozilla Firefox
    Eagle  screenshot 1
    Eagle  screenshot 1
    Eagle  screenshot 2
    +11
    Eagle  screenshot 3
    71 alternatives
    4.0
    Very Good8 reviews
  9. Grammarly icon
     245 likes

    Offers real-time grammar checks, generative AI drafting, and comprehensive feedback on clarity, tone, and style for confident and polished writing.

    Cost / License

    • Freemium
    • Proprietary

    Platforms

    • Mac
    • Windows
    • Online
    • Microsoft Edge
    • Google Chrome
    • Microsoft Outlook
    • Safari
    • Microsoft Word
    • Software as a Service (SaaS)
    • Mozilla Firefox
    Grammarly screenshot 1
    Grammarly screenshot 1
    Grammarly screenshot 2
    +2
    Grammarly screenshot 3
    151 alternatives
    3.5
    Good22 reviews
  10. IPFS icon
     176 likes

    IPFS is a global, versioned, peer-to-peer filesystem. It combines ideas from Git, BitTorrent, Kademlia, SFS, and the web. It is like a single bittorrent swarm, exchanging git objects. IPFS provides an interface as simple as the HTTP web, but with permanence built in.

    Cost / License

    • Free
    • Open Source

    Platforms

    • Mac
    • Windows
    • Linux
    • BSD
    • Self-Hosted
    • Firefox
    IPFS screenshot 1
    IPFS screenshot 1
    IPFS Peers Map
    +1
    IPFS Status Page
    69 alternatives
  11. LibRedirect icon
     51 likes

    A web extension that redirects YouTube, Twitter, Instagram... requests to alternative privacy friendly frontends and backends.

    Cost / License

    Application type

    Platforms

    • Vivaldi
    • Google Chrome
    • Opera
    • Brave
    • Mozilla Firefox
    • Linux
    • Flathub
    LibRedirect screenshot 1
    LibRedirect screenshot 1
    LibRedirect screenshot 2
    +2
    LibRedirect screenshot 3
    21 alternatives
    4.5
    Excellent17 reviews
  12. Snowflake Tor icon
     66 likes

    Snowflake is a system to defeat internet censorship. People who are censored can use Snowflake to access the internet. Their connection goes through Snowflake proxies, which are run by volunteers.

    Cost / License

    • Free
    • Open Source

    Platforms

    • Google Chrome
    • Mozilla Firefox
    Snowflake Tor screenshot 1
    Snowflake Tor screenshot 1
    Snowflake Tor screenshot 2
    +1
    Snowflake Tor screenshot 3
    11 alternatives
  13. Turtl icon
     179 likes

    Whether it's bookmarks or passwords, files or shopping lists...Turtl organizes it all and makes it easy to find later. Sync across your devices. Leave nothing behind.

    Cost / License

    • Freemium
    • Open Source

    Alerts

    • Discontinued

    Platforms

    • Mac
    • Windows
    • Linux
    • Android
    • Android Tablet
    • Self-Hosted
    • Google Chrome
    • Firefox
    Turtl screenshot 1
    Turtl screenshot 1
    Turtl screenshot 2
    +1
    Turtl screenshot 3
    193 alternatives
    4.3
    Very Good11 reviews
  14. Feedbro icon
     101 likes

    Fast & free RSS feed reader as a browser extension for Chrome, Vivaldi, Edge, Brave and Firefox for reading blogs, news or any RSS, Atom or RDF based feed.

    Cost / License

    • Free
    • Proprietary

    Application types

    Platforms

    • Online
    • Microsoft Edge
    • Google Chrome
    • Firefox
    Feedbro has built-in integrations to various social media sites - even the ones that don't provide RSS natively like Facebook, Instagram and Twitter
    Feedbro screenshot 1
    Feedbro includes a powerful rule engine for automatic processing, highlighting etc.
    +6
    Dark mode provided built-in
    246 alternatives
    4.6
    Excellent12 reviews
  15. Diigo icon
     306 likes

    Save, annotate, and organize web resources with highlighters, sticky notes, cross-device sync, Outliner, advanced search, and flexible sharing options.

    Cost / License

    • Freemium
    • Proprietary

    Platforms

    • Online
    • iPhone
    • iPad
    • Google Chrome
    • Safari
    • Mozilla Firefox
    Diigo screenshot 1
    Diigo screenshot 1
    Diigo screenshot 2
    +3
    Diigo screenshot 3
    127 alternatives
    3.0
    Fair9 reviews
  16. 2FAS Authenticator is a simple and free application for Two Factor Authentication (2FA Authentication) which generates Time-based One-time Passwords (TOTP) and PUSH authentication*.

    Cost / License

    • Free
    • Open Source

    Application type

    Platforms

    • Android
    • iPhone
    • Android Tablet
    • iPad
    • Google Chrome
    • Mozilla Firefox
    2FA Authenticator (2FAS) screenshot 1
    2FA Authenticator (2FAS) screenshot 1
    2FA Authenticator (2FAS) screenshot 2
    +3
    2FA Authenticator (2FAS) screenshot 3
    67 alternatives
    4.6
    Excellent9 reviews
  17. Memex icon
     112 likes

    A reading app that keeps you in the flow of your online reading & research. Save, annotate, share & collaborate without leaving your tab.

    Cost / License

    • Freemium
    • Proprietary (MIT)

    Platforms

    • Android
    • iPhone
    • Android Tablet
    • iPad
    • Vivaldi Browser
    • Google Chrome
    • Brave
    • Firefox
    Memex screenshot 1
    Memex screenshot 1
    Memex screenshot 2
    +2
    Memex screenshot 3
    85 alternatives
    3.0
    Fair9 reviews
  18. uMatrix icon
     181 likes

    Point & click to forbid/allow any class of requests made by your browser. Use it to block scripts, iframes, ads, facebook, etc.

    Cost / License

    • Free
    • Open Source

    Application types

    Alerts

    • Discontinued

    Platforms

    • Google Chrome
    • Opera
    • Brave
    • Firefox
    uMatrix screenshot 1
    uMatrix screenshot 1
    uMatrix screenshot 2
    +5
    uMatrix screenshot 3
    82 alternatives
    4.5
    Excellent15 reviews
  19. Consent-O-Matic icon
     40 likes

    Automatically handles GDPR consent dialogs in browsers, lets you set privacy preferences once, supports major browsers, and defaults to stricter privacy options.

    Cost / License

    • Free
    • Open Source

    Application type

    Platforms

    • Google Chrome
    • Mozilla Firefox
    • Microsoft Edge
    • Safari
    Consent-O-Matic screenshot 1
    Consent-O-Matic screenshot 1
    Consent-O-Matic screenshot 2
    +5
    Consent-O-Matic screenshot 3