Tafoegings
BuiltWith Technology Profiler
Find out what the website you are visiting is built with using this extension.
Edit the Page
Toggles the 'Design Mode' so that you can edit the contents of the page.
Firebug Lite for Opera 15+
Live HTTP Headers
Monitor all HTTP/HTTPs traffic from your browser.
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.
SEO-tools
Custom Style Script
Add Custom JavaScript (JS) Code or Styles (CSS) to any Page.
ChroPath for Opera
AutonomIQ offers a developers platform ChroPath to generate and validate unique selectors like relative xpath with iframe support
Google Analytics Debugger
A browser extension for debugging Google Analytics tracking code
Luminous: JavaScript events blocker
An experimental extension to identify, analyze and block code execution and event collection through JavaScript in your browser.
Block Yourself from Analytics
Block your Google Analytics™ activity for the websites you own, no more false stats.
WordPress Theme and Plugins Detector
This tool detects theme and plugins used on WordPress sites and displays information about them.
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!
fonts infos
An extention to show/inspect and analyze fonts in web-pages.
DomainUserAgent
This extension changes the UserAgent sent by your browser on a per-domain base. You can set up a different UserAgent for a specific domain, but still use the default one otherwise.
JavaScript QR Code
Make QR Codes in JavaScript
Web Sniffer
View all HTTP Requests and Responses sent between the Web browser and the Web server.
ColorHexa - Color Information and Conversion
Color tool converting and providing information about any color.
AddCSS
This extension allows you to add your own custom website specific CSS style sheets.
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
Website Analysis & SEO Tool
Website SEO audit tool that provides website analysis in SEO, performance, validity, security, accessibility and other criteria.
OctoLinker
OctoLinker – Links together, what belongs together.
Random password generator
A simple random password generator for Opera browser
HTTP Headers
Quickly view the HTTP headers of the current tab.
Mini-Browser for Multitasking
Use web utilities/tools without leaving the tab
NetworkMonitor
Shows the response times and uptime of a desired server. Useful to see how performs internet or a wireless access point.
AddJS
This extension allows you to add your own custom website specific JavaScript.
OCR - Image Reader
A powerful optical character recognition (OCR) extension to capture and convert images to text
Web Capture for Jira
Take a screenshot, annotate it and upload directly to Jira.
SEO Analysis with Seoptimer
Just one click to SEO Analysis with Seoptimer