Leudachain
Modify Header Value
Add, modify or remove a header for any request on desired domains.
PixelGrid
The tool to overlap your website layout with a grid.
Wayback machine website
Online service that have 452 billion web pages saved over time and who is domain tool in context menu
.no { CSS }
Opera 12 reminiscent Shift-G CSS zapper (use Alt-G)
Open in GIMP photo editor
Adds context menu items to send image links and image files directly to the GIMP photo editor
Lorem Fill
A webpage form filler that populates context specific random test data into forms elements.
Nextsense XML Signing Component
Signing XML document.
PageSpeed Insights
This will take the URL of the current tab and send it to PageSpeed Insights for a web performance analysis.
OctoLinker
OctoLinker – Links together, what belongs together.
HTTP Headers
Quickly view the HTTP headers of the current tab.
W3C Markup Validation Service
This validator checks the markup validity of Web documents in HTML, XHTML, SMIL, MathML, etc.
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.
TestCase Studio
TestCase Studio record the user actions performed on a web application in English Sentences.
Apple Docs Force Default Language
Forces Apple's developer documentation to always open in a specific language
JavaScript QR Code
Make QR Codes in JavaScript
Определение CMS - iTrack
Расширение для определения CMS сайта
CF-Predictor
This extension predicts rating changes for Codeforces. It shows approximate deltas during and after the contest.
WebMoney Advisor Next
Internet users feedback about the sites
PIX Studio Plugin
PIX Studio Plugin
KML/KMZ Viewer
Can be used to view KML/KMZ Files in the browser.
Edit with Sublime Text
Edit an HTML element and all its child nodes in Sublime Text editor with real-time updates
Webfonting it!
The simplest extension for working with web fonts
SEO Nofollow links highlighter
Highlight all nofollow links on any site you want. Excellent for SEO purposes.
Check Wordpress Version
WordPress Vulnerability Scanner - Scan for vulnerabilities, version, themes, plugins and much more!
Colored favicons for Salesforce
Make the favicon in different color based on which salesforce instance your are loggen into.
Hitsteps Visitor Manager
Get your website analytics insight and get notified about updates and live support requests in your dashboard
MultiPass
Automatically login to Basic Authentication using data based on URL regexp.
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.
Webmaster menu
Adds new items to browser context menu that open various analyzes of browsed web pages and sites.
Browser Update Watchdog
Notifies you, whenever your browser has been automatically updated.
Involta Short links
Сервис сокращения ссылок