Extensions
Octotree
GitHub on steroids
stylish-hub
A browser extension that brings a new GitHub experience
ModHeader
Modify HTTP request and response headers
AddCSS
This extension allows you to add your own custom website specific CSS style sheets.
Luminous: JavaScript events blocker
An experimental extension to identify, analyze and block code execution and event collection through JavaScript in your browser.
Live HTTP Headers
Monitor all HTTP/HTTPs traffic from your browser.
Custom Style Script
Add Custom JavaScript (JS) Code or Styles (CSS) to any Page.
NetworkMonitor
Shows the response times and uptime of a desired server. Useful to see how performs internet or a wireless access point.
SEO-tools
SEO-tools - информация о доменах, аудит сайтов на SEO ошибки, а также технический аудит любой страницы. Свыше 100 онлайн сервисов
OCR - Image Reader
A powerful optical character recognition (OCR) extension to capture and convert images to text
OctoLinker
OctoLinker – Links together, what belongs together.
PDF API HTML5
Mini SDK JavaScript and APIs library to create PDF file for web apps
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!
AddJS
This extension allows you to add your own custom website specific JavaScript.
fonts infos
An extention to show/inspect and analyze fonts in web-pages.
JavaScript QR Code
Make QR Codes in JavaScript
WordPress Theme and Plugins Detector
This tool detects theme and plugins used on WordPress sites and displays information about them.
Edit the Page
Toggles the 'Design Mode' so that you can edit the contents of the page.
HTTP Headers
Quickly view the HTTP headers of the current tab.
Edit with Adobe Photoshop
Adds a context menu item to send image links directly to Adobe Photoshop photo editor
PixelGrid
The tool to overlap your website layout with a grid.
Website Analysis & SEO Tool
Website SEO audit tool that provides website analysis in SEO, performance, validity, security, accessibility and other criteria.
Wayback machine website
Online service that have 452 billion web pages saved over time and who is domain tool in context menu
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, ...
Rabbit URL Opener
Rabbit URL Opener - Bulk URL's Opener Extension just lets you open multiple URLs at once
Right Click Validator
Right click on any webpage to validate it using the W3 NUValidator service.
Modify Header Value
Add, modify or remove a header for any request on desired domains.
Random password generator
A simple random password generator for Opera browser
PageSpeed Insights
This will take the URL of the current tab and send it to PageSpeed Insights for a web performance analysis.
Edit with Paint.Net
Adds a context menu item to send image links directly to Paint.Net photo editor
Selenium Page Object Generator
A nimble and flexible Selenium Page Object Model generator to improve agile testing process velocity.