Picture in Play
Indicates whether the `picture` element is in use on a page.
A webpage form filler that populates context specific random test data into forms elements.
Selenium Page Object Generator
A nimble and flexible Selenium Page Object Model generator to improve agile testing process velocity.
Alix allows you to lint your HTML for Accessibility issues simply by applying a stylesheet that makes use of advanced CSS selectors.
Corser - Authorize CORS requests
Cross-browser extension for authorizing cross-origin resource sharing (CORS) requests. This extension can be installed on browsers supporting the WebExtensions API (https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions) It intercepts all CORS requests and responses headers, and records/adds/changes their values so as to authorized unauthorized CORS requests. Use this extension only for testing purposes
SEO Nofollow links highlighter
Highlight all nofollow links on any site you want. Excellent for SEO purposes.
Website Analysis & SEO Tool
Website SEO audit tool that provides website analysis in SEO, performance, validity, security, accessibility and other criteria.
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.
OctoLinker – Links together, what belongs together.
Open in GIMP photo editor
Adds a context menu item to send images directly to GIMP photo editor
Web Developer Checklist
Analyses any web page for violations of best practices
W3C Markup Validation Service
This validator checks the markup validity of Web documents in HTML, XHTML, SMIL, MathML, etc.
Modify O Tabs
Automatically pin or rename a tab of a site you specify or change its icon.
Colored favicons for Salesforce
Make the favicon in different color based on which salesforce instance your are loggen into.
Scanning website for vulnerable js libraries
Browser Update Watchdog
Notifies you, whenever your browser has been automatically updated.
Wayback machine website
Online service that have 452 billion web pages saved over time and who is domain tool in context menu
Can be used to view KML/KMZ Files in the browser.
Automatically login to Basic Authentication using data based on URL regexp.
SEO Wykop - wycena stron, analiza SEO
This extension show the element of a document in a tree view!
An extention to show/inspect and analyze fonts in web-pages.
Hitsteps Visitor Manager
Get your website analytics insight and get notified about updates and live support requests in your dashboard
Random password generator
A simple random password generator for Opera browser
.net exception beutifier
Beautifies the standard .net error screen
Luminate Online Page Editor
Edit Luminate Online pages with just one click.
Builds Tab for Github
Adds a builds tab to Github repos.
ColorHexa - Color Information and Conversion
Color tool converting and providing information about any color.
GitHub Source Code Minimap
GitHub Source Code Minimap
md5 hash generator
MD5 hash generator (offline mode)
GitHub: Tell Me When It Closes
Add tellmewhenitcloses.com button to GitHub issues and pull requests.