Extensions
ColorHexa - Color Information and Conversion
Color tool converting and providing information about any color.
Selenium Page Object Generator
A nimble and flexible Selenium Page Object Model generator to improve agile testing process velocity.
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 Developer Checklist
Analyses any web page for violations of best practices
Luminous: JavaScript events blocker
An experimental extension to identify, analyze and block code execution and event collection through JavaScript in your browser.
Zend Debugger Toolbar
Provides integration with Zend debugging and profiling tools.
Flag & WHOIS SEO Domain Full Info
Return the domain's IP address , information about security, localization of server, ping, etc.
Open in GIMP photo editor
Adds context menu items to send image links and image files directly to the GIMP photo editor
Block Yourself from Analytics
Block your Google Analytics™ activity for the websites you own, no more false stats.
SEO Analysis with Seoptimer
Just one click to SEO Analysis with Seoptimer
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 Color Changer
Extends the Developer Tools, adding a sidebar for colors manipulation
KML/KMZ Viewer
Can be used to view KML/KMZ Files in the browser.
Octotree Pro
GitHub code tree on steroids
OctoLinker
OctoLinker – Links together, what belongs together.
Edit with Paint.Net
Adds a context menu item to send image links directly to Paint.Net photo editor
NoFollow
Outlines nofollow links, detects nofollow and noindex meta tags on webpages. Features website filtering and custom CSS outline styles
AMP Validator
Automatically checks each page for AMP validation.
Modify O Tabs
Automatically pin or rename a tab of a site you specify or change its icon.
CF-Predictor
This extension predicts rating changes for Codeforces. It shows approximate deltas during and after the contest.
Lorem Fill
A webpage form filler that populates context specific random test data into forms elements.
PageTester
W3C Markup Validation Service
This validator checks the markup validity of Web documents in HTML, XHTML, SMIL, MathML, etc.
MultiPass
Automatically login to Basic Authentication using data based on URL regexp.
Update Notification
Get notified of Opera automatic updates
.no { CSS }
Opera 12 reminiscent Shift-G CSS zapper (use Alt-G)
SEO TOOLS - YATEO
Opens all the essential tools for SEO in one click.
{DOM.Tree}
This extension show the element of a document in a tree view!
CSS Shapes Editor
Interactive editor for CSS Shapes.
Alix
Alix allows you to lint your HTML for Accessibility issues simply by applying a stylesheet that makes use of advanced CSS selectors.