To use these add-ons, you'll need to download Firefox.

  • Web Archives

    Web Archives

    View archived and cached versions of web pages on 10+ search engines, such as the Wayback Machine, Archive․is, Google, Bing and Yandex

    57,423 users

  • Search by Image

    Search by Image

    A powerful reverse image search tool, with support for various search engines, such as Google, Bing, Yandex, Baidu and TinEye.

    310,331 users

  • Side View

    Side View

    Open a mobile view of a page in the sidebar

    14,619 users

  • Firefox Translations

    Firefox Translations

    Translate web sites in your browser without using the cloud.

    330,310 users

  • Multithreaded Download Manager

    Multithreaded Download Manager

    Download manager with multithreading support.

    8,629 users

  • Bookmarks Manager and Viewer

    Bookmarks Manager and Viewer

    An elegant bookmarks manager with fuzzy search and more

    4,244 users

  • Sidebar+

    Sidebar+

    Sidebar for Firefox

    274 users

  • Imagus

    Imagus

    With a simple mouse-over you can enlarge images and display images/videos from links.

    62,969 users

  • Easy Screenshot

    Easy Screenshot

    Capture a screenshot of the whole webpage, and save in your desktop in default.

    3,319,402 users

  • NoScript Security Suite

    NoScript Security Suite

    The best security you can get in a web browser! Allow potentially malicious web content to run only from sites you trust. Protect yourself against XSS other web security exploits.

    307,502 users

  • YesScript2

    YesScript2

    It marks the domain of the active tab untrusted, reloads the page and blocks scripts from running on it. An option for the user to stop a website eating up resources or doing malicious things even if it breaks the functionality of the page.

    1,772 users

  • Chameleon

    Chameleon

    Spoof your browser profile. Includes a few privacy enhancing options. A WebExtension port of Random Agent Spoofer.

    8,617 users

  • 视频弹出工具 - Popup Tool

    视频弹出工具 - Popup Tool

    这个扩展的功能是弹出HTML5的视频到独立窗口, 目前支持的视频网站有 Youtube, Bilibili, 腾讯视频, 优酷, 爱奇艺, 斗鱼直播. 其他网站上的视频可能不能完美支持. “窗口置顶”请参考扩展页面描述的内容

    1,688 users

  • Gesturefy

    Gesturefy

    Navigate, operate, and browse faster with mouse gestures! A customizable mouse gesture add-on with a variety of different commands.

    98,727 users

  • Print Edit WE

    Print Edit WE

    Edit the contents of a web page prior to printing or saving. Elements in the web page can be edited, formatted, hidden or deleted. Unwanted content, such as adverts and sidebars, can easily be removed.

    40,786 users

  • Save Page WE

    Save Page WE

    Save a complete web page (as currently displayed) as a single HTML file that can be opened in any browser. Save a single page, multiple selected pages or a list of page URLs. Automate saving from command line.

    22,008 users

  • Open With

    Open With

    Quickly test out your web pages in Chrome, Edge, Safari, or Opera. Open With opens the current page in your other browsers with just two clicks.

    4,466 users

  • xStyle

    xStyle

    Restyle the web with xStyle, a user styles manager. With xStyle you can install themes & skins for many sites and create your own.

    265 users

  • User-Agent Switcher

    User-Agent Switcher

    Quickly and easily switch between popular user-agent strings.

    26,349 users

  • Header Editor

    Header Editor

    Manage browser's requests, include modify the request headers and response headers, redirect requests, cancel requests

    12,559 users

  • Markdown Viewer Webext

    Markdown Viewer Webext

    Displays markdown documents beautified in your browser.

    8,540 users

  • Tab Session Manager

    Tab Session Manager

    Save and restore the state of windows and tabs. It also supports automatic saving and cloud sync.

    138,453 users

  • URL in a Box

    URL in a Box

    Puts a URL in a browser action or sidebar

    16 users

  • Mouse Gesture Events

    Mouse Gesture Events

    Control your browser faster and easier with gestures using mouse movement.

    6,191 users

  • Firefox Multi-Account Containers

    Firefox Multi-Account Containers

    Firefox Multi-Account Containers lets you keep parts of your online life separated into color-coded tabs. Cookies are separated by container, allowing you to use the web with multiple accounts and integrate Mozilla VPN for an extra layer of privacy.

    375,718 users

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