11,890 extensions found in Web Development

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Xdebug Helper for Firefox
This extension is very useful for PHP developers that are using PHP tools with Xdebug support like PHPStorm, Eclipse with PDT, Netbeans and MacGDBp or any other Xdebug compatible profiling tool like KCacheGrind, WinCacheGrind or Webgrind.
Rated 4.1 out of 5
BrianGilbert_
13,998 users
Proxy SwitchyOmega
Manage and switch between multiple proxies quickly & easily.
Rated 4.5 out of 5
Firefox user 12962115
13,838 users
SeoQuake SEO extension
Accelerate your SEO efforts on the fly. SEOquake is a free plugin for browsers that provides you with key SEO metrics for a specific page, along with other useful tools such as SEO Audit and many others.
Rated 4.4 out of 5
SeoQuake Team
13,534 users
Text Link
Allows URI texts written in webpages to be loaded by double clicks.
Rated 4.2 out of 5
Piro (piro_or)
13,232 users
JavaScript Toggle On and Off (WebExtension)
Toggle JavaScript engine on and off the easy way
Rated 4.1 out of 5
tlintspr
12,716 users
RESTED
A REST client for the rest of us
Rated 4.3 out of 5
Eline H
12,394 users
My IP Hider VPN
My IP Hider VPN is number one tool for hiding your IP and unblocking any web site! If your Firefox version is less then 55 please install older My IP Hider VPN from "Version History" (https://goo.gl/7ZQQjZ)
Rated 4.7 out of 5
MyIpHider.com
12,303 users
javascript
add javascript that will run on this domain. back up your scripts in the options area (shortcut there by clicking the "JS" letters in the bottom right)
Rated 4.3 out of 5
chee
11,528 users
Flag Cookies
A cookie and browser storage data manager on steroids to mark, 'flag', and manage cookies using rulesets.
Rated 3.7 out of 5
Jan Riechers
11,490 users
Fake Filler
A form filler that fills all form inputs (textboxes, textareas, radio buttons, dropdowns, etc.) with fake and randomly generated data. The purpose of this extension is to help developers and testers test forms quickly and easily.
Rated 4.3 out of 5
Hussein
11,442 users
Lightning Autofill
The most popular autofill extension, boosting productivity since 2010.
Rated 3.3 out of 5
tohodo.com
11,109 users
Imageye - Image downloader
Find and download all images on a web page.
Rated 3.5 out of 5
Meagan Amrach
10,829 users
Save Screenshot
Saves the current page as image file or copies it to clipboard.
Rated 4.5 out of 5
Manuel Reimer
10,514 users
Fonts Ninja
Speed up your design workflow!
Rated 4.6 out of 5
Fonts Ninja
10,466 users
Header Editor
Manage browser's requests, include modify the request headers and response headers, redirect requests, cancel requests
Rated 4.7 out of 5
泷涯
10,440 users
Modify Header Value
Add, modify or remove a header for any request on desired domains.
Rated 3.6 out of 5
Milen
10,271 users
JSON Lite
Fast JSON viewer - highlights, shows items count/size, handles large files
Rated 4.4 out of 5
Lauri Rooden
10,226 users
Get cookies.txt LOCALLY
Get cookies.txt, NEVER send information outside with open-source
Rated 4.9 out of 5
kairi
10,121 users
Mobile emulator
Smartphone emulator on computer very realistic with several models to test mobile websites.
Rated 3.9 out of 5
François
9,902 users
RESTer
A REST client for almost any web service.
Rated 4.8 out of 5
Jan
9,855 users
axe DevTools® - Web Accessibility Testing
Add accessibility auditing to the Firefox Developer Tools
Rated 4.2 out of 5
Deque Systems Inc.
9,840 users
Proxy Toggle
Toggle between direct connection and a single proxy server via a toolbar icon.
Rated 4.6 out of 5
Richard West
9,800 users
ScriptCat
Everything can be scripted, allowing your browser to do more!
Rated 4.7 out of 5
王一之
9,760 users
IP Address and Domain Information
The Ultimate online investigation tool! See detailed information about every IP Address, Domain Name and Provider.
Rated 4.5 out of 5
webdev7
9,686 users
Empty Cache Button
Cache clearing made easy. One click.
Rated 4.5 out of 5
mvm
9,648 users