Extensions
Responsive Web Design Tester
Responsive Web Design Tester is a quick and easy way to test your responsive website.
Octotree
GitHub code tree on steroids
Font Inspector
Click on any HTML element to get the font info in a popup
Modify Header Value
Add, modify or remove a header for any request on desired domains.
RemoteDev DevTools
Use Redux DevTools in the DevTools
PDF API HTML5
Mini SDK JavaScript and APIs library to create PDF file for web apps
Edit the Page
Toggles the 'Design Mode' so that you can edit the contents of the page.
Luminous: JavaScript events blocker
An experimental extension to identify, analyze and block code execution and event collection through JavaScript in your browser.
Live HTTP Headers
Monitor all HTTP/HTTPs traffic from your browser.
Right Click Validator
Right click on any webpage to validate it using the W3 NUValidator service.
SEO-tools
WordPress Theme and Plugins Detector
Cet outil détecte les thèmes et les plugins utilisés sur les sites WordPress et affiche des informations à leur sujet.
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!
AddCSS
This extension allows you to add your own custom website specific CSS style sheets.
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, ...
Website Color Changer
Extends the Developer Tools, adding a sidebar for colors manipulation
Edit with Adobe Photoshop
Adds a context menu item to send image links directly to Adobe Photoshop photo editor
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
JSON Finder
Browse JSON like you do it in Finder.
CF-Predictor
This extension predicts rating changes for Codeforces. It shows approximate deltas during and after the contest.
HTTP Headers
Quickly view the HTTP headers of the current tab.
PageSpeed Insights
This will take the URL of the current tab and send it to PageSpeed Insights for a web performance analysis.
Web Sniffer
View all HTTP Requests and Responses sent between the Web browser and the Web server.
Picture in Play
Indicates whether the `picture` element is in use on a page.
Web Developer Checklist
Analyses any web page for violations of best practices
fonts infos
An extention to show/inspect and analyze fonts in web-pages.
Lorem Fill
A webpage form filler that populates context specific random test data into forms elements.
Remove cookie(s) for the current domain
Remove cookie(s) for the current site with just one click
ChroPath for Opera
AutonomIQ offers a developers platform ChroPath to generate and validate unique selectors like relative xpath with iframe support
JavaScript QR Code
Make QR Codes in JavaScript
Website Analysis & SEO Tool
Website SEO audit tool that provides website analysis in SEO, performance, validity, security, accessibility and other criteria.
AddJS
This extension allows you to add your own custom website specific JavaScript.
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