Web Development

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SEO Status PageRank/Alexa Toolbar

See Google Pagerank (PR) and Alexa rank for each website you visit. Simple and customizable. You can see and use everything the toolbar offers, or strip it down to the bare essentials and place it in the status bar. Simple, quick, and very useful.

Rated 4 out of 5 stars (55)
17,895 users

FirePath

FirePath is a Firebug extension that adds a development tool to edit, inspect and generate XPath 1.0 expressions, CSS 3 selectors and JQuery selectors (Sizzle selector engine).

Rated 4 out of 5 stars (22)
85,577 users

Google Analytics Debugger No Restart

A devtools extension for debugging Google Analytics tracking code

Rated 5 out of 5 stars (2)
2,268 users

Quick Locale Switcher

Allows you to quickly switch to a different language (User Interface, Spell Checker Dictionary and Website content) in your Mozilla application.

Rated 3 out of 5 stars (88)
152,954 users

Custom UserAgent String No Restart

Add a custom useragent string for desired URLs or domains.

Rated 4 out of 5 stars (5)
3,955 users

JSON-handle No Restart

JSON编辑器,It's a browser and editor for JSON document.You can get a beautiful view.
对JSON格式的内容进行浏览和编辑,以树形图样式展现JSON文档,并可实时编辑。

Rated 4 out of 5 stars (28)
13,397 users

Pick That Color No Restart

A lightweight addon for selecting any color from web pages. It copies the Hex color code of any pixel that is displayed in your browser to clipboard. Just click the color wheel button near your address bar or press 'Ctrl+Shift+z'.

Rated 5 out of 5 stars (5)
2,934 users

Modify Header Value (HTTP Headers) No Restart

Add, modify or remove a header for any request on desired domains.

Rated 5 out of 5 stars (2)
1,556 users

Favorites (Selenium IDE)

A plugin for Selenium-IDE to have favorite test suites and open and execute the test suites with a single click

Rated 4 out of 5 stars (4)
18,593 users

Selenium IDE: Signature

Signature functions for Selenium IDE

Not yet rated
2,432 users

SSO Tracer

A debugger for SSO by filtering HTML requests, flagging authentication messages and displaying SAML messages.

Rated 5 out of 5 stars (2)
1,582 users

Charles Proxy Auto-Configuration

Configures Mozilla Firefox for use with Charles Web Debugging Proxy.

Rated 4 out of 5 stars (10)
12,517 users

toggle Responsive

Toggle responsive design mode with a button.

Rated 5 out of 5 stars (3)
3,733 users

HTTP/2 and SPDY indicator No Restart

An indicator showing HTTP/2 and SPDY support in the address bar.

Rated 4 out of 5 stars (21)
39,453 users

Flash Debugger No Restart

Debug Flash/SWF/Flex files on the web. Edit properties and inspect elements on the fly. View log output inside the extension. Run AS3 code against the active SWF. Access assets with the Explorer, profile memory consumption and much much more...

Not yet rated
1,717 users

Selenium IDE: Perl Formatter

Perl code formatters for Selenium IDE Project

Rated 4 out of 5 stars (1)
1,945 users

xpath finder

Find and experiment with xpath in web pages easily.

Rated 2 out of 5 stars (6)
7,277 users

Hide My IP VPN No Restart

Hide My IP VPN is number one tool for hiding your IP and unblocking any web site!

Rated 5 out of 5 stars (10)
9,254 users

React Developer Tools No Restart

React Developer Tools is a tool that allows you to inspect a React tree, including the component hierarchy, props, state, and more. To get started, just open the Firefox devtools and switch to the React tab.

Rated 5 out of 5 stars (3)
11,617 users

Panda Daily News & Inspiration No Restart

Keeping designers and hackers inspired every day.

The must have app for designers and hackers. Comfortably browse Hacker News, Designer News, Product Hunt, Dribbble, Behance and others all in one place. Never miss anything, again.

Rated 3 out of 5 stars (5)
1,278 users