HeadingsMap
The extension generates a document-map or index of any web document structured with headings and/or with sections in HTML 5. It shows the headings structure, the errors in the structure (ie. incorrect levels), and it works as HTML5 Outliner too.
5,336 users
FlashPlayer - SWF to HTML
Open SWF links of Adobe Animate (Flash) in a pure sandboxed JavaScript emulator
5,116 users
Full Screen for Firefox
Go full screen with one click on the full screen button. That includes also the full screen movies such as the YouTube, Vimeo, Dailymotion, Youku video player, etc.
4,994 users
YouTube Download Button
Free YouTube Download Button allows you to save YouTube video and audio files just in 1 click
4,878 users
FindSomething
在网页的源代码或js中找到一些有趣的东西。欢迎一起交流,微信canxiao_xiao
4,844 users
Page Screenshot
Take a screenshot from the entire website with just one click.
4,804 users
CSSViewer
A simple yet powerful CSS property viewer. For Firefox Quantum
4,667 users
UI.Vision RPA
UI.Vision RPA (formerly Kantu) is open-source Robotic Process Automation (RPA) software for task and test automation. It is 3 tools in 1: Visual web browser automation, Selenium IDE and AI-powered desktop automation for Windows, Mac and Linux.
4,652 users
Open in Tor Browser
Open current page or link in tor browser for better privacy
4,651 users
XML Viewer Plus
A powerful XML Viewer, supports text/regex and jQuery/CSS, XPath selectors
4,580 users
WebRTC Control
Have control over WebRTC (disable or enable) and protect your IP address.
4,554 users
MobiDevTools
A mobile devtools for debugging web sites and applications with the console, DOM, network info, sources, and more.
4,534 users
Tamper Data for FF Quantum
- Monitor live requests - Edit headers on live requests - Cancel live requests - Redirect live requests Click the blue cloud in the toolbar to start tampering. When you're done, click it again to stop.
4,534 users
Detailed SEO Extension
Get SEO insights at the click of a button to any website you're currently on. Built by full-time SEO's for daily analysis.
4,527 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.
4,519 users
Language Switch
Allows to change the language identifier sent to webservers to whatever language you need.
4,507 users
Pomodoro clock extension
A simple pomodoro clock to hack your productivity.
4,503 users
SelectorsHub
xPath plugin to generate, write and verify xpath & cssSelector. It auto generates all kinds of relative xpath, axes xpath, index xpath, css selector.
4,432 users
Canvas Defender
Instead of completely blocking canvas fingerprinting, Canvas Defender add-on creates a unique and persistent noise that hides your real canvas fingerprint. This add-on protects you while browsing both in normal and private mode.
4,417 users
ICPBravoAccess
ICPBravo Access ICPBrasil and General PKI Extension.
4,408 users
Basic JSON Formatter
Adds a page action to pretty-print JSON. Unlike similar extensions, this simply pretty-prints it. It doesn't add any kind of viewer, colors, or collapsing. If you want this to work as expected, disable devtools.jsonview.enabled in about:config.
4,393 users
Pretty XML
Pretty XML is a browser-based XML viewer
4,294 users
HTTP request maker
Displays a sidebar that lets you to forge HTTP requests. Press Ctrl+Shift+Y to show the sidebar and make your own HTTP request. You can choose the method GET, HEAD, POST, OPTIONS, PUT DELETE and the body data to send. Response in the main window.
4,243 users
Pixel Perfect Pro
Pixel Perfect Pro helps developers and designers to make best sites and more high quality products.
4,206 users
WCAG Contrast checker
Checks for compliance with the contrast levels of foreground and background colors combination based on the requirements of WCAG 2.2
4,179 users