Laajennukset
BuiltWith Technology Profiler
Find out what the website you are visiting is built with using this extension.
Live HTTP Headers
Monitor all HTTP/HTTPs traffic from your browser.
Octotree
GitHub code tree on steroids
Firebug Lite for Opera 15+
Right Click Validator
Right click on any webpage to validate it using the W3 NUValidator service.
Font Inspector
Click on any HTML element to get the font info in a popup
PDF API HTML5
Mini SDK JavaScript and APIs library to create PDF file for web apps
RemoteDev DevTools
Use Redux DevTools in the DevTools
SEO-tools
HTTP Headers
Quickly view the HTTP headers of the current tab.
Web Sniffer
View all HTTP Requests and Responses sent between the Web browser and the Web server.
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!
Website Color Changer
Extends the Developer Tools, adding a sidebar for colors manipulation
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, ...
JSON Finder
Browse JSON like you do it in Finder.
ChroPath for Opera
AutonomIQ offers a developers platform ChroPath to generate and validate unique selectors like relative xpath with iframe support
Get Thumbnails or Image to video YouTube
Make thumbnail previews or images from YouTube videos
Picture in Play
Indicates whether the `picture` element is in use on a page.
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
Luminous: JavaScript events blocker
An experimental extension to identify, analyze and block code execution and event collection through JavaScript in your browser.
WordPress Theme and Plugins Detector
This tool detects theme and plugins used on WordPress sites and displays information about them.
JavaScript QR Code
Make QR Codes in JavaScript
Edit the Page
Toggles the 'Design Mode' so that you can edit the contents of the page.
CF-Predictor
This extension predicts rating changes for Codeforces. It shows approximate deltas during and after the contest.
Google Analytics Debugger
A browser extension for debugging Google Analytics tracking code
SEO Analysis with Seoptimer
Just one click to SEO Analysis with Seoptimer
Flag & WHOIS SEO Domain Full Info
Return the domain's IP address , information about security, localization of server, ping, etc.
Selenium Page Object Generator
A nimble and flexible Selenium Page Object Model generator to improve agile testing process velocity.
Web Developer Checklist
Analyses any web page for violations of best practices
AddJS
This extension allows you to add your own custom website specific JavaScript.
Block Yourself from Analytics
Block your Google Analytics™ activity for the websites you own, no more false stats.
fonts infos
An extention to show/inspect and analyze fonts in web-pages.
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