Extensions
Live HTTP Headers
Monitor all HTTP/HTTPs traffic from your browser.
Firebug Lite for Opera 15+
Disable Cookies
Disable cookies for current domain.
Octotree
GitHub on steroids
PDF API HTML5
Mini SDK JavaScript and APIs library to create PDF file for web apps
ModHeader
Modify HTTP request and response headers
Custom Style Script
Add Custom JavaScript (JS) Code or Styles (CSS) to any Page.
Web Sniffer
View all HTTP Requests and Responses sent between the Web browser and the Web server.
RemoteDev DevTools
Use Redux DevTools in the DevTools
stylish-hub
A browser extension that brings a new GitHub experience
AddCSS
This extension allows you to add your own custom website specific CSS style sheets.
WordPress Theme and Plugins Detector
This tool detects theme and plugins used on WordPress sites and displays information about them.
JSON Finder
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.
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, ...
Modify Header Value
Add, modify or remove a header for any request on desired domains.
SEO-tools
ColorHexa - Color Information and Conversion
Color tool converting and providing information about any color.
NetworkMonitor
Shows the response times and uptime of a desired server. Useful to see how performs internet or a wireless access point.
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!
OCR - Image Reader
A powerful optical character recognition (OCR) extension to capture and convert images to text
Edit the Page
Toggles the 'Design Mode' so that you can edit the contents of the page.
Google Analytics Debugger
A browser extension for debugging Google Analytics tracking code
HTTP Headers
Quickly view the HTTP headers of the current tab.
Get Thumbnails or Image to video YouTube
Make thumbnail previews or images from YouTube videos
Remove cookie(s) for the current domain
Remove cookie(s) for the current site with just one click
Webfonting it!
The simplest extension for working with web fonts
Website Analysis & SEO Tool
Website SEO audit tool that provides website analysis in SEO, performance, validity, security, accessibility and other criteria.
SEO Analysis with Seoptimer
Just one click to SEO Analysis with Seoptimer
Website Color Changer
Extends the Developer Tools, adding a sidebar for colors manipulation
ChroPath for Opera
AutonomIQ offers a developers platform ChroPath to generate and validate unique selectors like relative xpath with iframe support
NoFollow
Outlines nofollow links, detects nofollow and noindex meta tags on webpages. Features website filtering and custom CSS outline styles
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