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ChroPath for Opera
AutonomIQ offers a developers platform ChroPath to generate and validate unique selectors like relative xpath with iframe support
BuiltWith Technology Profiler
Find out what the website you are visiting is built with using this extension.
OCR - Image Reader
A powerful optical character recognition (OCR) extension to capture and convert images to text
Font Inspector
Click on any HTML element to get the font info in a popup!
AddCSS
This extension allows you to add your own custom website specific CSS style sheets.
Custom Style Script
Add Custom JavaScript (JS) Code or Styles (CSS) to any Page.
PDF API HTML5
Mini SDK JavaScript and APIs library to create PDF file for web apps
stylish-hub
A browser extension that brings a new GitHub experience
SEO-tools
SEO-tools - информация о доменах, аудит сайтов на SEO ошибки, а также технический аудит любой страницы. Свыше 100 онлайн сервисов
Block Yourself from Analytics
Block your Google Analytics™ activity for the websites you own, no more false stats.
Live HTTP Headers
Monitor all HTTP/HTTPs traffic from your browser.
Google Analytics Debugger
A browser extension for debugging Google Analytics tracking code
WordPress Theme and Plugins Detector
This tool detects theme and plugins used on WordPress sites and displays information about them.
.no { CSS }
Opera 12 reminiscent Shift-G CSS zapper (use Alt-G)
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!
Edit the Page
Toggles the 'Design Mode' so that you can edit the contents of the page.
NetworkMonitor
Shows the response times and uptime of a desired server. Useful to see how performs internet or a wireless access point.
Selenium Page Object Generator
A nimble and flexible Selenium Page Object Model generator to improve agile testing process velocity.
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, ...
Website Analysis & SEO Tool
Website SEO audit tool that provides website analysis in SEO, performance, validity, security, accessibility and other criteria.
HTTP Headers
Quickly view the HTTP headers of the current tab.
Random password generator
A simple random password generator for Opera browser
AddJS
This extension allows you to add your own custom website specific JavaScript.
JavaScript QR Code
Make QR Codes in JavaScript
Web Capture for Jira
Take a screenshot, annotate it and upload directly to Jira.
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
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
Right Click Validator
Right click on any webpage to validate it using the W3 NUValidator service.
Get Thumbnails or Image to video YouTube
Make thumbnail previews or images from YouTube videos
Rabbit URL Opener
Rabbit URL Opener - Bulk URL's Opener Extension just lets you open multiple URLs at once