Extensions
Block Yourself from Analytics
Block your Google Analytics™ activity for the websites you own, no more false stats.
BuiltWith Technology Profiler
Find out what the website you are visiting is built with using this extension.
RDS bar
Quick SEO analysis of websites and pages, designed for webmasters and SEOs.
AddCSS
This extension allows you to add your own custom website specific CSS style sheets.
PDF API HTML5
Mini SDK JavaScript and APIs library to create PDF file for web apps
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 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, ...
Live HTTP Headers
Monitor all HTTP/HTTPs traffic from your browser.
Random password generator
A simple random password generator for Opera browser
Google Analytics Debugger
A browser extension for debugging Google Analytics tracking code
SEO-tools
NetworkMonitor
Shows the response times and uptime of a desired server. Useful to see how performs internet or a wireless access point.
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
Edit with Adobe Photoshop
Adds a context menu item to send image links directly to Adobe Photoshop photo editor
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!
stylish-hub
A browser extension that brings a new GitHub experience
Modify Header Value
Add, modify or remove a header for any request on desired domains.
AddJS
This extension allows you to add your own custom website specific JavaScript.
Open in GIMP photo editor
Adds context menu items to send image links and image files directly to the GIMP photo editor
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)
fonts infos
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.
(X)HTML5 Checker
A small extension to validate the markup of current tab
Right Click Validator
Right click on any webpage to validate it using the W3 NUValidator service.
NoFollow
Outlines nofollow links, detects nofollow and noindex meta tags on webpages. Features website filtering and custom CSS outline styles
CF-Predictor
This extension predicts rating changes for Codeforces. It shows approximate deltas during and after the contest.
JavaScript QR Code
Make QR Codes in JavaScript
MenuButton
Custom menu allows the user to create a menu to access various network resources.
Wayback machine website
Online service that have 452 billion web pages saved over time and who is domain tool in context menu
Website Analysis & SEO Tool
Website SEO audit tool that provides website analysis in SEO, performance, validity, security, accessibility and other criteria.