Extensions
ModHeader
Modify HTTP request and response headers
Octotree
GitHub on steroids
WordPress Theme and Plugins Detector
Cet outil détecte les thèmes et les plugins utilisés sur les sites WordPress et affiche des informations à leur sujet.
Live HTTP Headers
Monitor all HTTP/HTTPs traffic from your browser.
Block Yourself from Analytics
Block your Google Analytics™ activity for the websites you own, no more false stats.
NetworkMonitor
Shows the response times and uptime of a desired server. Useful to see how performs internet or a wireless access point.
PDF API HTML5
Mini SDK JavaScript and APIs library to create PDF file for web apps
RDS bar
Quick SEO analysis of websites and pages, designed for webmasters and SEOs.
SEO-tools
Edit the Page
Toggles the 'Design Mode' so that you can edit the contents of the page.
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
OCR - Image Reader
A powerful optical character recognition (OCR) extension to capture and convert images to text
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!
Google Analytics Debugger
A browser extension for debugging Google Analytics tracking code
stylish-hub
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
HTTP Headers
Quickly view the HTTP headers of the current tab.
AddJS
This extension allows you to add your own custom website specific JavaScript.
CF-Predictor
This extension predicts rating changes for Codeforces. It shows approximate deltas during and after the contest.
fonts infos
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.
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
SEO Analysis with Seoptimer
Just one click to SEO Analysis with Seoptimer
Right Click Validator
Right click on any webpage to validate it using the W3 NUValidator service.
Random password generator
A simple random password generator for Opera browser
JavaScript QR Code
Make QR Codes in JavaScript
Lorem Fill
A webpage form filler that populates context specific random test data into forms elements.
Web Capture for Jira
Take a screenshot, annotate it and upload directly to Jira.
Webmaster menu
Adds new items to browser context menu that open various analyzes of browsed web pages and sites.
(X)HTML5 Checker
A small extension to validate the markup of current tab
Modify Header Value
Add, modify or remove a header for any request on desired domains.