Ignore X-Frame-Options Header
Allows all sites to be loaded in iframes, despite X-Frame-Options header settings.
9,233 users
Emoji Keyboard - Emojis For Firefox
A free extension of the web tool https://coolsymbol.com/emojis/emoji-for-copy-and-paste.html. It helps input emoji in the web browser with an extensive search functionality.
8,693 users
axe DevTools® - Web Accessibility Testing
Add accessibility auditing to the Firefox Developer Tools
8,485 users
EditThisCookie2
EditThisCookie is a cookie manager. You can add, delete, edit, search, protect and block cookies!
8,472 users
Html Validator
HTML Validator is a Mozilla extension that adds HTML validation inside Firefox, Mozilla. The number of errors of a HTML page is seen on the form of an icon For Firefox 56, use 0.974 (see all versions below). For Firefox 57, see Web Extensions.
8,442 users
BuiltWith
BuiltWith is a web site profiler tool. Upon looking up a page, BuiltWith returns a list all the technologies in use on that page that it can find.
8,427 users
WhatRuns
Discover what runs a website - This Firefox extension helps you identify technologies used on any website at the click of a button.
8,364 users
HackBar
A HackBar for new firefox (Firefox Quantum). This addon is written in webextension and alternatives to the XUL version of original Hackbar. Press F12 to use HackBar
8,008 users
Page Saver WE screenshot capture tool
Quickly and easily capture an image of a web page. Options allow you to control output format (PNG or JPEG), file name and more.
7,845 users
Form History Control
Manage form history entries (search, edit, cleanup, export/import) and easy text formfiller. Auto-save text entered in any form while typing to allow fast recovery when disaster strikes.
7,590 users
MobiDevTools
A mobile devtools for debugging web sites and applications with the console, DOM, network info, sources, and more.
7,534 users
ruler
Simple tool for measuring arbitrary parts of a page. Does not and will never contain adware.
7,493 users
All Downloader Professional
All Downloader Professional finds links, images, videos, documents on a website an make them downloadable.
7,487 users
WebScrapBook
Capture web pages to local device or backend server for future retrieval, organization, annotation, and edit.
7,327 users
CORS Unblock
No more CORS error by appending 'Access-Control-Allow-Origin: *' header to local and remote web requests when enabled
6,941 users
daily.dev | The homepage developers deserve
Get one personalized feed for all the knowledge you need as a developer.
6,914 users
