Mga extension
(X)HTML5 Checker
A small extension to validate the markup of current tab
JavaScript QR Code
Make QR Codes in JavaScript
Nextsense PDF Signing Component
Signing PDF document.
GitHub Extension
The GitHub Browser Extension allows GitHub users to quickly find and open all of their assigned issues and pull requests from a single location. It can be handy for developers and project managers to view their tasks.
OctoLinker
OctoLinker – Links together, what belongs together.
SEO Nofollow links highlighter
Highlight all nofollow links on any site you want. Excellent for SEO purposes.
WordPress Theme and Plugins Detector
This tool detects theme and plugins used on WordPress sites and displays information about them.
W3C Markup Validation Service
This validator checks the markup validity of Web documents in HTML, XHTML, SMIL, MathML, etc.
Web Capture for Jira
Take a screenshot, annotate it and upload directly to Jira.
Design Mode
Edit any page's content by switching to design mode, where you can modify the content and drag images around like a Word Editor
NsLookup - Find DNS Records
A simple and powerful tool for querying DNS records
HexDump - Hex Viewer
Display file contents in hexadecimal, and ascii
Sitemap Explorer: Check and View XML Sitemaps
This extension helps you find, inspect, export, and view XML Sitemap files for any site you navigate in a browser.
InTab - Code CSS 2X Faster
Visually Style Any Website In Any Browser
Blendup
A tool for web developers to preview blend modes on different page elements.
HypeStat Analyzer
Check any website's traffic
Nextsense XML Signing Component
Signing XML document.
TestCase Studio
TestCase Studio record the user actions performed on a web application in English Sentences.
.no { CSS }
Opera 12 reminiscent Shift-G CSS zapper (use Alt-G)
CSS3 Button Maker
Is CSS button code generator free easy tool that allows you create beautiful and elegant CSS web buttons in few clicks
Get Thumbnails or Image to video YouTube
Make thumbnail previews or images from YouTube videos
Colored favicons for Salesforce
Make the favicon in different color based on which salesforce instance your are loggen into.
Block Yourself from Analytics
Block your Google Analytics™ activity for the websites you own, no more false stats.
Open in GIMP photo editor
Adds context menu items to send image links and image files directly to the GIMP photo editor
Monitorito
This extension creates a real-time visualisation of your browsing activity
Webmaster menu
Adds new items to browser context menu that open various analyzes of browsed web pages and sites.
Strike Out Nofollow Links
Just strikes out nofollow links via CSS3 selectors.
Tabby Extension
Easily add BookMarks to Tabby from your preferred browser!
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.
Website Links Checker
This tool helps you check all links from a page you are currently viewing.
Polypane helper
Open the current page or links in Polypane, the developer tool for responsive web development and design.
Service Worker Detector
This extension detects if a website registers a Service Worker.