CryptoPro Extension for CAdES Browser Plug-in
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Super Auto Refresh
Auto-refresh (reload) pages, on a selected interval. NO ADs. SUPER EASY.
User-Agent Switcher is a quick and easy way to switch between user-agents.
Adds a toolbar button with various web developer tools. The official port of the Web Developer extension for Firefox.
Save All Images
a customizable extension to save selected images from the current tab page
Formats and highlights JSON data loaded from file or server.
Redesign the web with Stylus, a user styles manager. Stylus allows you to easily install themes and skins for many popular sites.
HTML5 Editor with CSS, JS, HTML validator and beautify code
Quick SEO analysis of websites and pages, designed for webmasters and SEOs.
RESTMan is a browser extension to work on http requests.
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.
Open in Google Chrome
Open current page, link, or all tabs in the Chrome browser.
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!
Disable cookies for current domain.
Get all CSS styles of selected text
Go full screen with one click on the button.
Internet Speed Test
Test your internet connection speed (upload and download) from a toolbar panel
A REST client for the rest of us
Live HTTP Headers
Monitor all HTTP/HTTPs traffic from your browser.
Modify Header Value
Add, modify or remove a header for any request on desired domains.
The Vewd TV Simulator enables any developers to test and debug their HTML5 apps for the Vewd App Store.
Responsive Web Design Tester
Responsive Web Design Tester is a quick and easy way to test your responsive website.
Adds Access-Control-Allow-Origin, Access-Control-Allow-Methods and Access-Control-Allow-Headers headers for CORS.
PDF API HTML5
BuiltWith Technology Profiler
Find out what the website you are visiting is built with using this extension.
SEcure Addons Manager for Opera
Custom Style Script