GitHub (Enterprise) Projects Plus
[Deprecated] Adds advanced labels management and other functionality to GitHub.
Quick SEO analysis of websites and pages, designed for webmasters and SEOs.
Click on any HTML element to get the font info in a popup!
GitHub on steroids
Random password generator
A simple random password generator for Opera browser
Picture in Play
Indicates whether the `picture` element is in use on a page.
SEO-tools - информация о доменах, аудит сайтов на SEO ошибки, а также технический аудит любой страницы. Свыше 100 онлайн сервисов
Scan your NFT assets.
Responsive Web Design Tester
Responsive Web Design Tester is a quick and easy way to test your responsive website.
Disable cookies for current domain.
Custom Style Script
BuiltWith Technology Profiler
Find out what the website you are visiting is built with using this extension.
Extension source viewer
View source code of extensions in the Chrome Web Store, Firefox or Opera addon gallery. Has button to install from Chrome Web Store.
GitHub Projects Plus
Adds advanced labels management and other functionality to GitHub.
Shows the response times and uptime of a desired server. Useful to see how performs internet or a wireless access point.
Edit the Page
Toggles the 'Design Mode' so that you can edit the contents of the page.
A browser extension that brings a new GitHub experience
WordPress Theme and Plugins Detector
This tool detects theme and plugins used on WordPress sites and displays information about them.
Block Yourself from Analytics
Block your Google Analytics™ activity for the websites you own, no more false stats.
Edit with Adobe Photoshop
Adds a context menu item to send image links directly to Adobe Photoshop photo editor
This extension allows you to add your own custom website specific CSS style sheets.
Get Thumbnails or Image to video YouTube
Make thumbnail previews or images from YouTube videos
The simplest extension for working with web fonts
Live HTTP Headers
Monitor all HTTP/HTTPs traffic from your browser.
Browserling - Cross-browser testing
Cross-browser test websites in the most popular browsers such as Internet Explorer, Edge, Chrome, Firefox, Safari and Opera. Try for free!
Live editor for CSS and LESS - Magic CSS
Live preview of CSS/LESS code with an in-page editor. Autocomplete, convert LESS to CSS, beautify, minify, CSS reloader, linter, ...
Quickly view the HTTP headers of the current tab.
Wayback machine website
Online service that have 452 billion web pages saved over time and who is domain tool in context menu
Website Analysis & SEO Tool
Website SEO audit tool that provides website analysis in SEO, performance, validity, security, accessibility and other criteria.
The tool to overlap your website layout with a grid.
DNS Checker - SEO and Domain Analysis
SEO and Domain Analysis Tool by DNS Checker. Provides SEO Report, Meta Redirects and 404s, Client IP, Domain IP & Geo Location, etc