Extensions
BuiltWith Technology Profiler
Find out what the website you are visiting is built with using this extension.
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.
Octotree
GitHub on steroids
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.
SEO-tools
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.
stylish-hub
A browser extension that brings a new GitHub experience
OCR - Image Reader
A powerful optical character recognition (OCR) extension to capture and convert images to text
ChroPath for Opera
AutonomIQ offers a developers platform ChroPath to generate and validate unique selectors like relative xpath with iframe support
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, ...
NetworkMonitor
Shows the response times and uptime of a desired server. Useful to see how performs internet or a wireless access point.
CF-Predictor
This extension predicts rating changes for Codeforces. It shows approximate deltas during and after the contest.
Random password generator
A simple random password generator for Opera browser
AddJS
This extension allows you to add your own custom website specific JavaScript.
Edit with Adobe Photoshop
Adds a context menu item to send image links directly to Adobe Photoshop photo editor
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
Right Click Validator
Right click on any webpage to validate it using the W3 NUValidator service.
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!
Modify Header Value
Add, modify or remove a header for any request on desired domains.
(X)HTML5 Checker
A small extension to validate the markup of current tab
HTTP Headers
Quickly view the HTTP headers of the 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
.no { CSS }
Opera 12 reminiscent Shift-G CSS zapper (use Alt-G)
Website Analysis & SEO Tool
Website SEO audit tool that provides website analysis in SEO, performance, validity, security, accessibility and other criteria.
fonts infos
An extention to show/inspect and analyze fonts in web-pages.
Nextsense XML Signing Component
Signing XML document.
Webmaster menu
Adds new items to browser context menu that open various analyzes of browsed web pages and sites.
Lorem Fill
A webpage form filler that populates context specific random test data into forms elements.
Rabbit URL Opener
Rabbit URL Opener - Bulk URL's Opener Extension just lets you open multiple URLs at once