Measure Element
Shows width, height, or alignment of selected area at anywhere on webpage in pixels.
350 users
EndPointer
EndPointer: Advanced Endpoint Parser and Extractor EndPointer is a tool designed for developers, security researchers, and web application testers. It parses and extracts endpoints from web applications, providing a comprehensive view.
349 users
Headers
Take control of your web requests with the Headers extension for Firefox! This powerful tool allows you to effortlessly add, modify, or remove HTTP headers for any website you visit, giving you enhanced privacy, security, and customization options.
348 users
Website and IP address blocker
Block Websites and IP address. Additional feature: Option to only block the homepage.
346 users
SEOInfo
Shows SEO issues as you navigate pages. Displays performance data, redirects, structured data and errors for HTML pages. Save to Excel.
346 users
SpeedVitals
Perform Web Vitals Test & TTFB Test on Multiple Locations & Devices. SpeedVitals Extension helps measure the performance of a website directly from that website itself.
346 users
OWASP Penetration Testing Kit
Penetration Testing Kit is an extension for application security practitioners, penetration testers, and red teams. Penetration Testing Kit is an extension for application security practitioners, penetration testers, and red teams.
345 users
CSP Content Security Policy Generator
Best Content-Security-Policy generator to automatically create Strict CSP policies (with SHA support) for any website.
345 users
ClickJacking
ClickJacking is a tool developed by Pentester Helper to help website owners determine if their website is vulnerable to clickjacking.
343 users
Toggley
Switch between the default themes: Toggley is a Light / Dark mode toggle button for Firefox.
342 users
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.
342 users
JSON Editor
A JSON Editor Extension based on the amazing JSON Editor Online https://github.com/josdejong/svelte-jsoneditor Source code: https://github.com/fractalf/json-editor-ex
341 users
The Stream Detector PLUS
Detects playlists and subtitles used by streams, incl. custom file extensions and headers. Assembles readymade commands for tools.
341 users
JavaScript Errors Notifier
Notifies JavaScript errors by icon in toolbar bar or notification popup GitHub → https://goo.gl/RBcFK8 Test page → https://goo.gl/IEXS2y
341 users
mSession Keeper
An extension to keep your web-sessions alive. Maintains active sessions of Web Applications, that have an inactivity timeouts. Based on Session Keeper by Guillaume Boudreau.
338 users
YT Nonstop
No more 'Video paused. Continue watching?' confirmation box! And with two extra options: 1) disable autoplay; 2) loop playlist.
336 users
gRPC-Web Developer Tools
gRPC-Web Developer Tools for debugging application's gRPC-Web network requests.
332 users
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.
327 users
Compteur de carte Trello
Cette extension permet de toujours afficher le nombre de cartes d'une liste dans un tableau Trello. Cette extension utilise des fonctionnalités natives sans JavaScript pour garantir des performances optimales.
326 users
Canvas Blocker - Fingerprint Protect
Prevent HTML canvas element from generating a unique identification key to protect user's privacy
326 users
