This extension allows you to add your own custom website specific CSS style sheets.
Gives you approximate count of lines of code on GitHub
Novibyte Issues Plugin
Jira Issues Management
Random password generator
A simple random password generator for Opera browser
OCR - Image Reader
A powerful optical character recognition (OCR) extension to capture and convert images to text
Quick SEO analysis of websites and pages, designed for webmasters and SEOs.
A browser extension that brings a new GitHub experience
BuiltWith Technology Profiler
Find out what the website you are visiting is built with using this extension.
Edit the Page
Toggles the 'Design Mode' so that you can edit the contents of the page.
Responsive Web Design Tester
Responsive Web Design Tester is a quick and easy way to test your responsive website.
SEO-tools - информация о доменах, аудит сайтов на SEO ошибки, а также технический аудит любой страницы. Свыше 100 онлайн сервисов
Scan your NFT assets.
Shows the response times and uptime of a desired server. Useful to see how performs internet or a wireless access point.
Disable cookies for current domain.
GitHub Projects Plus
Adds advanced labels management and other functionality to GitHub.
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, ...
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!
WordPress Theme and Plugins Detector
This tool detects theme and plugins used on WordPress sites and displays information about them.
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.
PDF API HTML5
Block Yourself from Analytics
Block your Google Analytics™ activity for the websites you own, no more false stats.
Web Capture for Jira
Take a screenshot, annotate it and upload directly to Jira.
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
Website Analysis & SEO Tool
Website SEO audit tool that provides website analysis in SEO, performance, validity, security, accessibility and other criteria.
The simplest extension for working with web fonts
SelectorsHub helps to generate, write and verify the XPath & cssSelector.
Edit with Adobe Photoshop
Adds a context menu item to send image links directly to Adobe Photoshop photo editor
Quickly view the HTTP headers of the current tab.
ChroPath for Opera
AutonomIQ offers a developers platform ChroPath to generate and validate unique selectors like relative xpath with iframe support
Wayback machine website
Online service that have 452 billion web pages saved over time and who is domain tool in context menu