Extensions
Modify Header Value
Add, modify or remove a header for any request on desired domains.
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
SEO-tools
Live HTTP Headers
Monitor all HTTP/HTTPs traffic from your browser.
JSON Finder
Browse JSON like you do it in Finder.
PDF API HTML5
Mini SDK JavaScript and APIs library to create PDF file for web apps
Firebug Lite for Opera 15+
Octotree
GitHub code tree on steroids
Luminous: JavaScript events blocker
An experimental extension to identify, analyze and block code execution and event collection through JavaScript in 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!
Font Inspector
Click on any HTML element to get the font info in a popup
AddCSS
This extension allows you to add your own custom website specific CSS style sheets.
RemoteDev DevTools
Use Redux DevTools in the DevTools
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, ...
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.
Google Analytics Debugger
A browser extension for debugging Google Analytics tracking code
Website Analysis & SEO Tool
Website SEO audit tool that provides website analysis in SEO, performance, validity, security, accessibility and other criteria.
HTTP Headers
Quickly view the HTTP headers of the current tab.
Edit the Page
Toggles the 'Design Mode' so that you can edit the contents of the page.
NetworkMonitor
Shows the response times and uptime of a desired server. Useful to see how performs internet or a wireless access point.
Flag & WHOIS SEO Domain Full Info
Return the domain's IP address , information about security, localization of server, ping, etc.
ChroPath for Opera
AutonomIQ offers a developers platform ChroPath to generate and validate unique selectors like relative xpath with iframe support
AddJS
This extension allows you to add your own custom website specific JavaScript.
fonts infos
An extention to show/inspect and analyze fonts in web-pages.
Get Thumbnails or Image to video YouTube
Faites une vignette ou des images à partir de vidéos YouTube
Webfonting it!
L'extension la plus simple pour travailler avec des polices sur le Web
PageSpeed Insights
This will take the URL of the current tab and send it to PageSpeed Insights for a web performance analysis.
SEO Analysis with Seoptimer
Just one click to SEO Analysis with Seoptimer
Edit with Adobe Photoshop
Adds a context menu item to send image links directly to Adobe Photoshop photo editor
Website Color Changer
Extends the Developer Tools, adding a sidebar for colors manipulation
Open in GIMP photo editor
Adds a context menu item to send images directly to GIMP photo editor
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