A REST client for the rest of us
Shows notifications about various events in TeamCity
GitHub on steroids
Picture in Play
Indicates whether the `picture` element is in use on a page.
Apple Docs Force Default Language
Forces Apple's developer documentation to always open in a specific language
SEO-tools - информация о доменах, аудит сайтов на SEO ошибки, а также технический аудит любой страницы. Свыше 100 онлайн сервисов
Disable cookies for current domain.
OCR - Image Reader
A powerful optical character recognition (OCR) extension to capture and convert images to text
Responsive Web Design Tester
Responsive Web Design Tester is a quick and easy way to test your responsive website.
This extension allows you to add your own custom website specific CSS style sheets.
Random password generator
A simple random password generator for Opera browser
Quick SEO analysis of websites and pages, designed for webmasters and SEOs.
Custom Style Script
Live HTTP Headers
Monitor all HTTP/HTTPs traffic from your browser.
Block Yourself from Analytics
Block your Google Analytics™ activity for the websites you own, no more false stats.
Edit the Page
Toggles the 'Design Mode' so that you can edit the contents of the page.
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!
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.
BuiltWith Technology Profiler
Find out what the website you are visiting is built with using this extension.
PDF API HTML5
Edit with Adobe Photoshop
Adds a context menu item to send image links directly to Adobe Photoshop photo editor
A small extension to validate the markup of current tab
Modify Header Value
Add, modify or remove a header for any request on desired domains.
Wayback machine website
Online service that have 452 billion web pages saved over time and who is domain tool in context menu
A browser extension that brings a new GitHub experience
OctoLinker – Links together, what belongs together.
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
ChroPath for Opera
AutonomIQ offers a developers platform ChroPath to generate and validate unique selectors like relative xpath with iframe support
The tool to overlap your website layout with a grid.