Picture in Play
Indicates whether the `picture` element is in use on a page.
Use Redux DevTools in the DevTools
Custom Style Script
BuiltWith Technology Profiler
Find out what the website you are visiting is built with using this extension.
Firebug Lite for Opera 15+
Browse JSON like you do it in Finder.
Live HTTP Headers
Monitor all HTTP/HTTPs traffic from your browser.
Disable cookies for current domain.
PDF API HTML5
Edit the Page
Toggles the 'Design Mode' so that you can edit the contents of the page.
This extension allows you to add your own custom website specific CSS style sheets.
Modify Header Value
Add, modify or remove a header for any request on desired domains.
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, ...
Google Analytics Debugger
A browser extension for debugging Google Analytics tracking code
View all HTTP Requests and Responses sent between the Web browser and the Web server.
An extention to show/inspect and analyze fonts in web-pages.
Website Analysis & SEO Tool
Website SEO audit tool that provides website analysis in SEO, performance, validity, security, accessibility and other criteria.
WordPress Theme and Plugins Detector
This tool detects theme and plugins used on WordPress sites and displays information about them.
ChroPath for Opera
AutonomIQ offers a developers platform ChroPath to generate and validate unique selectors like relative xpath with iframe support
ColorHexa - Color Information and Conversion
Color tool converting and providing information about any color.
Right Click Validator
Right click on any webpage to validate it using the W3 NUValidator service.
Shows the response times and uptime of a desired server. Useful to see how performs internet or a wireless access point.
Remove cookie(s) for the current domain
Remove cookie(s) for the current site with just one click
A small extension to validate the markup of current tab
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!
A browser extension that brings a new GitHub experience
Edit with Adobe Photoshop
Adds a context menu item to send image links directly to Adobe Photoshop photo editor
Get Thumbnails or Image to video YouTube
Make thumbnail previews or images from YouTube videos