BuiltWith Technology Profiler
Find out what the website you are visiting is built with using this extension.
Live HTTP Headers
Monitor all HTTP/HTTPs traffic from your browser.
Modify HTTP request and response headers
This extension allows you to add your own custom website specific CSS style sheets.
OCR - Image Reader
A powerful optical character recognition (OCR) extension to capture and convert images to text
Block Yourself from Analytics
Block your Google Analytics™ activity for the websites you own, no more false stats.
WordPress Theme and Plugins Detector
This tool detects theme and plugins used on WordPress sites and displays information about them.
PDF API HTML5
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.
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 the Page
Toggles the 'Design Mode' so that you can edit the contents of the page.
ChroPath for Opera
AutonomIQ offers a developers platform ChroPath to generate and validate unique selectors like relative xpath with iframe support
A browser extension that brings a new GitHub experience
Quickly view the HTTP headers of the current tab.
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!
An extention to show/inspect and analyze fonts in web-pages.
Web Capture for Jira
Take a screenshot, annotate it and upload directly to Jira.
SEO Analysis with Seoptimer
Just one click to SEO Analysis with Seoptimer
This extension predicts rating changes for Codeforces. It shows approximate deltas during and after the contest.
DNS Checker - SEO and Domain Analysis
SEO and Domain Analysis Tool by DNS Checker. Provides SEO Report, Meta Redirects and 404s, Client IP, Domain IP & Geo Location, etc
A small extension to validate the markup of current tab
Edit with Adobe Photoshop
Adds a context menu item to send image links directly to Adobe Photoshop photo editor
Adds new items to browser context menu that open various analyzes of browsed web pages and sites.
Website Analysis & SEO Tool
Website SEO audit tool that provides website analysis in SEO, performance, validity, security, accessibility and other criteria.
Selenium Page Object Generator
A nimble and flexible Selenium Page Object Model generator to improve agile testing process velocity.
Random password generator
A simple random password generator for Opera browser
Right Click Validator
Right click on any webpage to validate it using the W3 NUValidator service.