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
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
Open a mobile view of a page in the sidebar
14,619 users
Firefox Translations
Translate web sites in your browser without using the cloud.
330,310 users
Multithreaded Download Manager
Download manager with multithreading support.
8,629 users
Bookmarks Manager and Viewer
An elegant bookmarks manager with fuzzy search and more
4,244 users
Sidebar+
Sidebar for Firefox
274 users
Imagus
With a simple mouse-over you can enlarge images and display images/videos from links.
62,969 users
Easy Screenshot
Capture a screenshot of the whole webpage, and save in your desktop in default.
3,319,402 users
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
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
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
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
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
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 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
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
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
Quickly and easily switch between popular user-agent strings.
26,349 users
Header Editor
Manage browser's requests, include modify the request headers and response headers, redirect requests, cancel requests
12,559 users
Markdown Viewer Webext
Displays markdown documents beautified in your browser.
8,540 users
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
Puts a URL in a browser action or sidebar
16 users
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 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