Leudachain
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, ...
Octobox
Integrate Octobox directly into your GitHub workflow
Design Mode
Edit any page's content by switching to design mode, where you can modify the content and drag images around like a Word Editor
Piral Inspector
The official Piral developer tools browser extension.
Polypad (Open in App)
Polypad Open in App.
JavaScript QR Code
Make QR Codes in JavaScript
W3DNA
Type '*' plus press "space" and a search term into the Omnibox to open search in new tab.
Web Widgetizer
Web Widgetizer is a extension offering a range of features to enhance browsing. It allows users to create separate Opera windows for specific websites, manage favorite links, customize window dimensions, toggle auto-start, and open links in popup tabs via button click or shortcut (Ctrl + Shift + A). This versatile tool optimizes browsing convenience and efficiency.
.no { CSS }
Opera 12 reminiscent Shift-G CSS zapper (use Alt-G)
StyleMaster
Добавление пользовательских стилей CSS на веб-сайты
DomainUserAgent
This extension changes the UserAgent sent by your browser on a per-domain base. You can set up a different UserAgent for a specific domain, but still use the default one otherwise.
Tech Finder - Website Technology Detector
Discover what technologies and frameworks websites are using with detailed analysis and categorization.
InTab - Code CSS 2X Faster
Visually Style Any Website In Any Browser
PX to REM and REM to PX
PX / REM bidirectional converter
Sitemap Explorer: Check and View XML Sitemaps
This extension helps you find, inspect, export, and view XML Sitemap files for any site you navigate in a browser.
Blendup
A tool for web developers to preview blend modes on different page elements.
Open in Pale Moon
Open current page, link, or all tabs in the Pale Moon browser.
Extension Auditor
Browser Extension Security & Privacy Analyzer
Ninja Van Tracking
Track your Ninja Van Tracking Onilne
Bug Magnet
Bug Magnet
showHTML
This extension shows information about HTML elements on a web page when you hover over them.
Selenium Page Object Generator
A nimble and flexible Selenium Page Object Model generator to improve agile testing process velocity.
Rainbow States
Color AWS Step Functions states
Window Performance Test
Get accurate performance timing for any page with this extension
Service Worker Detector
This extension detects if a website registers a Service Worker.
Encode Decode HTML
Encode HTML to show it in the HTML pages a code instead of rendered HTML. Decode HTML to convert it back to HTML code
Page Load Time
Displays page load time in the toolbar
CSS3 Button Maker
Is CSS button code generator free easy tool that allows you create beautiful and elegant CSS web buttons in few clicks
SelectorsHub Pro
xPath plugin to auto generate, write and verify xpath & cssSelector.
Edit with Sublime Text
Live editing text and HTML content of the page with the Sublime Text from the page context or DevTools.
Webmaster menu
Adds new items to browser context menu that open various analyzes of browsed web pages and sites.
Shuffle Extension Toolbar
Customize the sequence of extension icons as you like