Extensiones
Picture in Play
Indicates whether the `picture` element is in use on a page.
ModHeader
Modify HTTP request and response headers
BuiltWith Technology Profiler
Find out what the website you are visiting is built with using this extension.
Luminous: JavaScript events blocker
Extensión experimental para identificar, analizar y bloquear código y eventos JavaScript en tu navegador.
Custom Style Script
Add Custom JavaScript (JS) Code or Styles (CSS) to any Page.
Disable Cookies
Disable cookies for current domain.
Firebug Lite for Opera 15+
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
SEO-tools
Live HTTP Headers
Monitor all HTTP/HTTPs traffic from your browser.
AddCSS
This extension allows you to add your own custom website specific CSS style sheets.
Google Analytics Debugger
A browser extension for debugging Google Analytics tracking code
Modify Header Value
Add, modify or remove a header for any request on desired domains.
Edit the Page
Toggles the 'Design Mode' so that you can edit the contents of the page.
fonts infos
An extention to show/inspect and analyze fonts in web-pages.
Website Analysis & SEO Tool
Website SEO audit tool that provides website analysis in SEO, performance, validity, security, accessibility and other criteria.
Web Sniffer
View all HTTP Requests and Responses sent between the Web browser and the Web server.
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, ...
WordPress Theme and Plugins Detector
This tool detects theme and plugins used on WordPress sites and displays information about them.
ChroPath for Opera
AutonomIQ offers a developers platform ChroPath to generate and validate unique selectors like relative xpath with iframe support
Right Click Validator
Right click on any webpage to validate it using the W3 NUValidator service.
(X)HTML5 Checker
A small extension to validate the markup of current tab
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!
NetworkMonitor
Shows the response times and uptime of a desired server. Useful to see how performs internet or a wireless access point.
Remove cookie(s) for the current domain
Remove cookie(s) for the current site with just one click
stylish-hub
A browser extension that brings a new GitHub experience
.no { CSS }
Opera 12 reminiscent Shift-G CSS zapper (use Alt-G)
Edit with Adobe Photoshop
Adds a context menu item to send image links directly to Adobe Photoshop photo editor
PageSpeed Insights
This will take the URL of the current tab and send it to PageSpeed Insights for a web performance analysis.
JavaScript QR Code
Make QR Codes in JavaScript
AddJS
This extension allows you to add your own custom website specific JavaScript.
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