拡張機能
Opera に新機能を追加することができます
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はCookie管理ソフトです。Cookieを追加、削除、編集、検索、保護、そしてブロックすることができます！
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
Stylus でウェブのデザインを変更しましょう。これは、ユーザースタイルを管理するツールです。Stylus を利用すると、多くの人気サイト向けのテーマやスキンを簡単にインストールできます。
JavaScript Switcher
Quick way to enable/disable Javascript
Podpis elektroniczny Szafir SDK
Open in Google Chrome
Open current page, link, or all tabs in the Chrome browser.
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
PerfectPixel by WellDoneCode
This extension helps develop your websites with per pixel accuracy!
TV Emulator
The Vewd TV Simulator enables any developers to test and debug their HTML5 apps for the Vewd App Store.
RestMan
RESTMan is a browser extension to work on http requests.
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
RDS bar
Quick SEO analysis of websites and pages, designed for webmasters and SEOs.
RESTED
A REST client for the rest of us
Firebug Lite for Opera 15+
Full Screen
Go full screen with one click on the button.
Internet Speed Test
Test your internet connection speed (upload and download) from a toolbar panel
Font Finder
Get all CSS styles of selected text
Cookie Editor
Edit cookies related to the current page and all its sub-frames right from a popup
Responsive Web Design Tester
Responsive Web Design Tester is a quick and easy way to test your responsive website.
CORS Toggle
Adds Access-Control-Allow-Origin, Access-Control-Allow-Methods and Access-Control-Allow-Headers headers for CORS.
Disable Cookies
Disable cookies for current domain.
Live HTTP Headers
Monitor all HTTP/HTTPs traffic from your browser.
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.