Modify Header Value
Add, modify or remove a header for any request on desired domains.
Edit cookies related to the current page and all its sub-frames right from a popup
Browserling - Cross-browser testing
Cross-browser test websites in the most popular browsers such as Internet Explorer, Edge, Chrome, Firefox, Safari and Opera. Try for free!
Code tree for GitHub
Custom Style Script
Click on any HTML element to get the font info in a popup
View all HTTP Requests and Responses sent between the Web browser and the Web server.
Right Click Validator
Right click on any webpage to validate it using the W3 NUValidator service.
Get Thumbnails or Image to video YouTube
Make thumbnail previews or images from YouTube videos
BuiltWith Technology Profiler
Find out what the website you are visiting is built with using this extension.
OctoLinker is the easiest and best way to navigate between files and projects on GitHub.com. Files containing the following keywords will now have links that redirect you either to the relative file or to the projects GitHub page. Depending on the value, it may redirect you to an external website like a manual page or another service.
Remove cookie(s) for the current domain
Remove cookie(s) for the current site with just one click
Live editor for CSS and LESS - Magic CSS
Live preview of CSS/LESS code with an in-page editor. Autocomplete, convert LESS to CSS, beautify, minify, CSS reloader, linter, ...
Java Interview Questions
This is an Speed Dial extension for Java Interview Questions & Answers
This extension allows you to add your own custom website specific CSS style sheets.
Website Color Changer
Extends the Developer Tools, adding a sidebar for colors manipulation
Use Redux DevTools in the DevTools
Google Analytics Debugger
A browser extension for debugging Google Analytics tracking code
WordPress Theme and Plugins Detector
Detects the theme and plugins used in WordPress and display information about them.
Edit with Adobe Photoshop
Adds a context menu item to send image links directly to Adobe Photoshop photo editor
Browse JSON like you do it in Finder.
Block Yourself from Analytics
Block your Google Analytics™ activity for the websites you own, no more false stats.
Corser - Authorize CORS requests
Cross-browser extension for authorizing cross-origin resource sharing (CORS) requests. This extension can be installed on browsers supporting the WebExtensions API (https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions) It intercepts all CORS requests and responses headers, and records/adds/changes their values so as to authorized unauthorized CORS requests. Use this extension only for testing purposes
Custom menu allows the user to create a menu to access various network resources.
Quickly view the HTTP headers of the current tab.
Edit the Page
Toggles the 'Design Mode' so that you can edit the contents of the page.
Shows the response times and uptime of a desired server. Useful to see how performs internet or a wireless access point.
The simplest extension for working with web fonts