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Find tools to improve your workflow - right within Firefox.

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Alexa RANK

Alexa Traffic Rank is Alexa Internet's free extension for Mozilla. Alexa Traffic Rank accompanies you as you surf, providing you with Alexa.com data about the sites you visit without interrupting your browsing.

Base64 Encoder and Decoder

Link Webbie Firefox add on that enables you to encode and decode strings in base64.

Sitemap Explorer: Check and View XML Sitemaps

This extension helps you find, inspect, export, and view XML Sitemap files for any site you navigate in a browser.

Adobe Target VEC Helper

Load your website's desktop and mobile views effortlessly in Adobe Target with the VEC helper extension

Twitch Text Emotes - temotes

Save your favorite text phrases ("LULW", "KEKW", emoticons, etc.) directly into the standard Twitch Emotes panel and use them in Twitch chat. Simple and useful.

VPN Master - Free HTTP and SOCKS Proxies

A free reliable VPN solution based on HTTP, SOCKS4, and SOCKS5 proxy servers

responsivo

A web extension for firefox allowing to view multiple view widths at once. Inspired by Emmet Re:view

LoadTabOnSelect

Load newly-opened background tabs on selection, rather than automatically in the background. This addon uses the WebExtensions API, and therefore fully supports Firefox 57+.

Easy Steam Collection

This will create an easier way to add all of your addons to any stream collection you create in a single click.

Easy Favicon Scraper

Download the favicon of a website with 1 click

Viewport

Displays the current viewport size when resizing the browser window.

SiteAnalyzer SEO Tools

SiteAnalyzer SEO Tools is a browser extension providing a set of tools for analyzing SEO indicators of web site, technical audit (links, images, meta tags, content, indexing, etc.), URL analysis and correction of SEO optimization errors.

Proxy Toggle

Button to switch between system-set (off) and manually-set (on) proxy.

Palette Creator

Creates a color palette from any image. Just right-click on the image and select the 'Palette Creator' option.

Webcompat.com Reporter

Adds a button to allow users to easily report site compatibility issues at webcompat.com, for the active tab.

Material Design Colors Picker

Copy a Material Design Color in one click in either #HEX, HEX, RGB and RGBA format.

Open Two-Factor Authenticator

A sync-able open-source two-factor authenticator

Image Map Editor

Check and editing the image maps inside the web page with magnifying glass.

Custom Site JS

Run your own (per url or domain) custom JavaScript on sites.

Performance-Analyser

Get insight into the performance of the website in the current tab - sort of a mini live version of WebPageTest.