Font Finder (revived)
An easy-to-use font inspector to get CSS styles of the selected element
17,715 人のユーザー
JavaScript Toggle On and Off (WebExtension)
Toggle JavaScript engine on and off the easy way
17,283 人のユーザー
WAVE Accessibility Extension
Evaluate web accessibility within the Firefox browser. When activated, the WAVE extension injects icons and indicators into your page to give feedback about accessibility and to facilitate manual evaluation.
17,067 人のユーザー
Allow Right-Click
Re-enable the possibility to use the context menu on sites that overrides it
16,640 人のユーザー
Colorpick Eyedropper
A simple eye-dropper & color-picker tool allowing you to select color values from webpages. You will need to enable the add-on bar Firefox menu->Options->Add-on Bar OR View->Toolbars->Add-on Bar Then refresh the page.
14,971 人のユーザー
IP Address and Domain Information
The Ultimate online investigation tool! See detailed information about every IP Address, Domain Name and Provider.
14,377 人のユーザー
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.
14,333 人のユーザー
ModHeader
Add and modify the HTTP request headers and response headers. Use ModHeader to: - Add / modify request and response headers - Add / modify cookies - Multi-profile support - Filtering based on URL, tab, or window - Export and share profiles
14,160 人のユーザー
Allow CORS: Access-Control-Allow-Origin
Easily add (Access-Control-Allow-Origin: *) rule to the response header.
13,085 人のユーザー
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
12,326 人のユーザー
X-Forwarded-For Header
This extension allows you quickly to set the X-Forwarded-For HTTP Header
12,031 人のユーザー
SQLite Manager
manage, edit, manipulate, plot and save one or multiple SQLite databases simultaneously
11,932 人のユーザー
Google Lighthouse
Lighthouse is an open-source, automated tool for improving the performance, quality, and correctness of your web apps.
11,787 人のユーザー
Canvas Defender
Instead of completely blocking canvas fingerprinting, Canvas Defender add-on creates a unique and persistent noise that hides your real canvas fingerprint. This add-on protects you while browsing both in normal and private mode.
11,377 人のユーザー
JetBrains Toolbox Extension
Clone and open projects from GitHub, GitLab, and Bitbucket in JetBrains IDEs right from your browser
11,336 人のユーザー
cookies.txt
Exports all cookies to a Netscape HTTP Cookie File, as used by curl, wget, and youtube-dl, among others.
11,250 人のユーザー
