Extensions
OCR - Image Reader
A powerful optical character recognition (OCR) extension to capture and convert images to text
Edit the Page
Toggles the 'Design Mode' so that you can edit the contents of the page.
ModHeader
Modify HTTP request and response headers
stylish-hub
A browser extension that brings a new GitHub experience
PDF API HTML5
Mini SDK JavaScript and APIs library to create PDF file for web apps
SEO-tools
SEO-tools - информация о доменах, аудит сайтов на SEO ошибки, а также технический аудит любой страницы. Свыше 100 онлайн сервисов
Random password generator
A simple random password generator for Opera browser
NetworkMonitor
Shows the response times and uptime of a desired server. Useful to see how performs internet or a wireless access point.
BuiltWith Technology Profiler
Find out what the website you are visiting is built with using this extension.
Advanced Site Checker
Check your site for issues.
AddCSS
This extension allows you to add your own custom website specific CSS style sheets.
WordPress Theme and Plugins Detector
This tool detects theme and plugins used on WordPress sites and displays information about them.
Web Capture for Jira
Take a screenshot, annotate it and upload directly to Jira.
Apple Docs Force Default Language
Forces Apple's developer documentation to always open in a specific language
NsLookup - Find DNS Records
A simple and powerful tool for querying DNS records
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
(X)HTML5 Checker
A small extension to validate the markup of current tab
JavaScript QR Code
Make QR Codes in JavaScript
PageSpeed Insights
This will take the URL of the current tab and send it to PageSpeed Insights for a web performance analysis.
Get Thumbnails or Image to video YouTube
Make thumbnail previews or images from YouTube videos
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, ...
Wayback machine website
Online service that have 452 billion web pages saved over time and who is domain tool in context menu
Nextsense XML Signing Component
Signing XML document.
Website Analysis & SEO Tool
Website SEO audit tool that provides website analysis in SEO, performance, validity, security, accessibility and other criteria.
ChroPath for Opera
AutonomIQ offers a developers platform ChroPath to generate and validate unique selectors like relative xpath with iframe support
HTTP Headers
Quickly view the HTTP headers of the current tab.
AddJS
This extension allows you to add your own custom website specific JavaScript.
Live HTTP Headers
Monitor all HTTP/HTTPs traffic from your browser.
Modify Header Value
Add, modify or remove a header for any request on desired domains.
fonts infos
An extention to show/inspect and analyze fonts in web-pages.
Edit with Adobe Photoshop
Adds a context menu item to send image links directly to Adobe Photoshop photo editor
Extensions for Mermaid
A browser extension for Chrome, Opera & Firefox that adds Mermaid language support to GitHub. A fork from the not updated GitHub + Mermaid extension.