Laajennukset
Disable Cookies
Disable cookies for current domain.
Right Click Validator
Right click on any webpage to validate it using the W3 NUValidator service.
SEO-tools
Live HTTP Headers
Monitor all HTTP/HTTPs traffic from your browser.
Firebug Lite for Opera 15+
RemoteDev DevTools
Use Redux DevTools in the DevTools
Luminous: JavaScript events blocker
An experimental extension to identify, analyze and block code execution and event collection through JavaScript in your browser.
Определение CMS - iTrack
Расширение для определения CMS сайта
Modify Header Value
Add, modify or remove a header for any request on desired domains.
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, ...
Octotree Pro
GitHub code tree on steroids
PDF API HTML5
Mini SDK JavaScript and APIs library to create PDF file for web apps
Font Inspector
Click on any HTML element to get the font info in a popup
Website Analysis & SEO Tool
Website SEO audit tool that provides website analysis in SEO, performance, validity, security, accessibility and other criteria.
JSON Finder
Browse JSON like you do it in Finder.
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!
SEO Analysis with Seoptimer
Just one click to SEO Analysis with Seoptimer
Edit the Page
Toggles the 'Design Mode' so that you can edit the contents of the page.
AddCSS
This extension allows you to add your own custom website specific CSS style sheets.
NetworkMonitor
Shows the response times and uptime of a desired server. Useful to see how performs internet or a wireless access point.
Web Developer Checklist
Analyses any web page for violations of best practices
KML/KMZ Viewer
Can be used to view KML/KMZ Files in the browser.
WordPress Theme and Plugins Detector
This tool detects theme and plugins used on WordPress sites and displays information about them.
Web Sniffer
View all HTTP Requests and Responses sent between the Web browser and the Web server.
Google Analytics Debugger
A browser extension for debugging Google Analytics tracking code
Lorem Fill
A webpage form filler that populates context specific random test data into forms elements.
Wayback machine website
Online service that have 452 billion web pages saved over time and who is domain tool in context menu
Website Color Changer
Extends the Developer Tools, adding a sidebar for colors manipulation
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
AddJS
This extension allows you to add your own custom website specific JavaScript.
Open in Vivaldi
Open current page, link, or all tabs in the Vivaldi browser.
Picture in Play
Indicates whether the `picture` element is in use on a page.
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