CryptoPro Extension for CAdES Browser Plug-in
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User-Agent Switcher is a quick and easy way to switch between user-agents.
Super Auto Refresh
Auto-refresh (reload) pages, on a selected interval. NO ADs. SUPER EASY.
Adds a toolbar button with various web developer tools. The official port of the Web Developer extension for Firefox.
HTML5 Editor with CSS, JS, HTML validator and beautify code
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.
Open in Google Chrome
Open current page, link, or all tabs in the Chrome browser.
RESTMan is a browser extension to work on http requests.
Internet Speed Test
Test your internet connection speed (upload and download) from a toolbar panel
Opera TV Emulator
The Opera TV Emulator enables any developers to test and debug their HTML5 apps for the Opera TV platform.
SEOquake is a free plugin that provides you with key SEO metrics, along with other useful tools such as SEO Audit and many others
Quick SEO analysis of websites and pages, designed for webmasters and SEOs.
PerfectPixel by WellDoneCode
This extension helps develop your websites with per pixel accuracy!
Disable cookies for current domain.
Responsive Web Design Tester
Responsive Web Design Tester is a quick and easy way to test your responsive website.
Redesign the web with Stylus, a user styles manager. Stylus allows you to easily install themes and skins for many popular sites.
A REST client for the rest of us
Go full screen with one click on the button.
Get all CSS styles of selected text
Custom Style Script
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.
Modify Header Value
Add, modify or remove a header for any request on desired domains.
PDF API HTML5
View all HTTP Requests and Responses sent between the Web browser and the Web server.
Remove cookie(s) for the current domain
Remove cookie(s) for the current site with just one click
BuiltWith Technology Profiler
Find out what the website you are visiting is built with using this extension.