Live HTTP Headers
Monitor all HTTP/HTTPs traffic from your browser.
Custom Style Script
Modify HTTP request and response headers
WordPress Theme and Plugins Detector
This tool detects theme and plugins used on WordPress sites and displays information about them.
Quick SEO analysis of websites and pages, designed for webmasters and SEOs.
OCR - Image Reader
A powerful optical character recognition (OCR) extension to capture and convert images to text
PDF API HTML5
Block Yourself from Analytics
Block your Google Analytics™ activity for the websites you own, no more false stats.
Edit the Page
Toggles the 'Design Mode' so that you can edit the contents of the page.
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!
ChroPath for Opera
AutonomIQ offers a developers platform ChroPath to generate and validate unique selectors like relative xpath with iframe support
Shows the response times and uptime of a desired server. Useful to see how performs internet or a wireless access point.
A browser extension that brings a new GitHub experience
Google Analytics Debugger
A browser extension for debugging Google Analytics tracking code
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 Adobe Photoshop
Adds a context menu item to send image links directly to Adobe Photoshop photo editor
Quickly view the HTTP headers of the current tab.
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.
This extension predicts rating changes for Codeforces. It shows approximate deltas during and after the contest.
Web Capture for Jira
Take a screenshot, annotate it and upload directly to Jira.
A small extension to validate the markup of current tab
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
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.
SEO Analysis with Seoptimer
Just one click to SEO Analysis with Seoptimer
Modify Header Value
Add, modify or remove a header for any request on desired domains.
A webpage form filler that populates context specific random test data into forms elements.
Adds new items to browser context menu that open various analyzes of browsed web pages and sites.