Disable cookies for current domain.
WordPress Theme and Plugins Detector
This tool detects theme and plugins used on WordPress sites and displays information about them.
Modify Header Value
Add, modify or remove a header for any request on desired domains.
PDF API HTML5
Live HTTP Headers
Monitor all HTTP/HTTPs traffic from your browser.
Edit the Page
Toggles the 'Design Mode' so that you can edit the contents of the page.
Custom Style Script
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!
This extension allows you to add your own custom website specific CSS style sheets.
Block Yourself from Analytics
Block your Google Analytics™ activity for the websites you own, no more false stats.
ColorHexa - Color Information and Conversion
Color tool converting and providing information about any color.
This extension changes the UserAgent sent by your browser on a per-domain base. You can set up a different UserAgent for a specific domain, but still use the default one otherwise.
An extention to show/inspect and analyze fonts in web-pages.
A browser extension that brings a new GitHub experience
ChroPath for Opera
AutonomIQ offers a developers platform ChroPath to generate and validate unique selectors like relative xpath with iframe support
Google Analytics Debugger
A browser extension for debugging Google Analytics tracking code
Right Click Validator
Right click on any webpage to validate it using the W3 NUValidator service.
SEO Analysis with Seoptimer
Just one click to SEO Analysis with Seoptimer
Website Analysis & SEO Tool
Website SEO audit tool that provides website analysis in SEO, performance, validity, security, accessibility and other criteria.
Shows the response times and uptime of a desired server. Useful to see how performs internet or a wireless access point.
Random password generator
A simple random password generator for Opera browser
Edit with Adobe Photoshop
Adds a context menu item to send image links directly to Adobe Photoshop photo editor
Wayback machine website
Online service that have 452 billion web pages saved over time and who is domain tool in context menu
Quickly view the HTTP headers of the current tab.
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, ...
Edit with Paint.Net
Adds a context menu item to send image links directly to Paint.Net photo editor
A small extension to validate the markup of current tab
The tool to overlap your website layout with a grid.