Extensions
Add new functionality to Opera
CryptoPro Extension for CAdES Browser Plug-in
Расширение позволяет использовать КриптоПро ЭЦП Browser plug-in в браузере. Для работы требует установленного ЭЦП Browser plug-in.
EditThisCookie
EditThisCookie is a cookie manager. You can add, delete, edit, search, protect and block cookies!
Super Auto Refresh
Auto-refresh (reload) pages, on a selected interval. NO ADs. SUPER EASY.
User-Agent Switcher
User-Agent Switcher is a quick and easy way to switch between user-agents.
Web Developer
Adds a toolbar button with various web developer tools. The official port of the Web Developer extension for Firefox.
Контур.Плагин
Web Mirrors
Web Sniffer
View all HTTP Requests and Responses sent between the Web browser and the Web server.
Save All Images
a customizable extension to save selected images from the current tab page
Stylus
Redesign the web with Stylus, a user styles manager. Stylus allows you to easily install themes and skins for many popular sites.
JavaScript Switcher
Quick way to enable/disable Javascript
Open in Google Chrome
Open current page, link, or all tabs in the Chrome browser.
Podpis elektroniczny Szafir SDK
JSON Lite
Fast JSON viewer - highlights, shows items count/size, handles large files
HTML5 Editor
HTML5 Editor with CSS, JS, HTML validator and beautify code
RestMan
RESTMan is a browser extension to work on http requests.
TV Emulator
The Vewd TV Simulator enables any developers to test and debug their HTML5 apps for the Vewd App Store.
Помощник диагностики
SeoQuake extension
SEOquake is a free plugin that provides you with key SEO metrics, along with other useful tools such as SEO Audit and many others
PerfectPixel by WellDoneCode
This extension helps develop your websites with per pixel accuracy!
RDS bar
Quick SEO analysis of websites and pages, designed for webmasters and SEOs.
Internet Speed Test
Test your internet connection speed (upload and download) from a toolbar panel
Firebug Lite for Opera 15+
RESTED
A REST client for the rest of us
Full Screen
Go full screen with one click on the full screen button. That includes also the full screen movies such as YouTube, Vimeo, etc.
Disable Cookies
Disable cookies for current domain.
Cookie Editor
Edit cookies related to the current page and all its sub-frames right from a popup
CORS Toggle
Adds Access-Control-Allow-Origin, Access-Control-Allow-Methods and Access-Control-Allow-Headers headers for CORS.
Font Finder
Get all CSS styles of selected text
Responsive Web Design Tester
Responsive Web Design Tester is a quick and easy way to test your responsive website.
Extension source viewer
View source code of extensions in the Chrome Web Store, Firefox or Opera addon gallery. Has button to install from Chrome Web Store.
Live HTTP Headers
Monitor all HTTP/HTTPs traffic from your browser.