Add extensions, get work done

tweak allows you to mock and modify HTTP requests without leaving the browser

Outlines nofollow links, detect nofollow and noindex meta tags on webpages. Features website filtering and custom CSS outline styles

Copy document URL / link URL to clipboard as HTML, Markdown, Text etc.

Adds "View Background Image" to the context menu.

Quickly resize the window to one of your favorite sizes

Download the images and videos.

Lets you quickly switch the browser locale to test localization on your website.

Make any webpage into a content editable document and modify it via toolbar popup!

A tool for designers to measure screen dimensions

Edit in Firefox the page displayed in any tab, with formatting tools.

🧑‍💻 Get implementation code for research papers directly on Google Search, ArXiv, Scholar, Twitter, Github, PubMed, IEEE, and more

Screenshots for the point and click bug tracker

User Script Manager with the support of Ace Stream technologies

React Context DevTool is a debugging tool for React Context and useReducer API.

Shows approximately what users will see if this webpage is shared on websites that uses OG tags to display a preview. Let you detect if no Open Graph Tags are set on your webpage ! The shown preview is inspired from the Facebook one.

This extension is used by developers to make it easy to save and fill forms for use in submission testing and validation.

Copy content from web powerful than ever before.

Jumpstart your web accessibility efforts directly in Firefox. Is your web page accessible for everyone? Assess the accessibility of your web pages conveniently in Mozilla Firefox browser with the Siteimprove Accessibility Checker.

One-click SEO extension. Quick access to SEO analysis. Features: website indexed pages, backlinks, Alexa, IP, SEO stats and tools.

Tool for debugging Ember applications.

Enables Web MIDI API in Firefox