Website Analysis & SEO Tool
Website SEO audit tool that provides website analysis in SEO, performance, validity, security, accessibility and other criteria.
A webpage form filler that populates context specific random test data into forms elements.
This extension predicts rating changes for Codeforces. It shows approximate deltas during and after the contest.
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
Flag & WHOIS SEO Domain Full Info
Return the domain's IP address , information about security, localization of server, ping, etc.
Get Thumbnails or Image to video YouTube
Make thumbnail previews or images from YouTube videos
Remove cookie(s) for the current domain
Remove cookie(s) for the current site with just one click
Internet users feedback about the sites
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.
Shows the response times and uptime of a desired server. Useful to see how performs internet or a wireless access point.
Fast balance viewer for your affiliate networks and partner programs
Random password generator
A simple random password generator for Opera browser
ColorHexa - Color Information and Conversion
Color tool converting and providing information about any color.
Open in GIMP photo editor
Adds a context menu item to send images directly to GIMP photo editor
Open in Vivaldi
Open current page, link, or all tabs in the Vivaldi browser.
Google Analytics Debugger
A browser extension for debugging Google Analytics tracking code
Custom menu allows the user to create a menu to access various network resources.
Picture in Play
Indicates whether the `picture` element is in use on a page.
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
Edit with Paint.Net
Adds a context menu item to send image links directly to Paint.Net photo editor
TO Helper allows you speed up your daily work as Chat Mod.
Builds Tab for Github
Adds a builds tab to Github repos.
Nextsense XML Signing Component
Signing XML document.
SEO Wykop - wycena stron, analiza SEO
SEO Nofollow links highlighter
Highlight all nofollow links on any site you want. Excellent for SEO purposes.
GitHub Source Code Minimap
GitHub Source Code Minimap
Outlines nofollow links, detects nofollow and noindex meta tags on webpages. Features website filtering and custom CSS outline styles
Arc Admin App Access
access Arc Publishing admin environments
.net exception beutifier
Beautifies the standard .net error screen