Quickly view the HTTP headers of the current tab.
Wayback machine website
Online service that have 452 billion web pages saved over time and who is domain tool in context menu
ColorHexa - Color Information and Conversion
Color tool converting and providing information about any color.
Open in Vivaldi
Open current page, link, or all tabs in the Vivaldi browser.
This extension predicts rating changes for Codeforces. It shows approximate deltas during and after the contest.
md5 hash generator
MD5 hash generator (offline mode)
A webpage form filler that populates context specific random test data into forms elements.
This extension show the element of a document in a tree view!
Outlines nofollow links, detects nofollow and noindex meta tags on webpages. Features website filtering and custom CSS outline styles
Block Yourself from Analytics
Block your Google Analytics™ activity for the websites you own, no more false stats.
Automatically login to Basic Authentication using data based on URL regexp.
Random password generator
A simple random password generator for Opera browser
Can be used to view KML/KMZ Files in the browser.
Zend Debugger Toolbar
Provides integration with Zend debugging and profiling tools.
CSS Gradient Inspector
Extends the Developer Tools, adding a sidebar that displays information about the gradients applied to the inspected element.
Browser Update Watchdog
Notifies you, whenever your browser has been automatically updated.
Edit with Paint.Net
Adds a context menu item to send image links directly to Paint.Net photo editor
SEO TOOLS - YATEO
Opens all the essential tools for SEO in one click.
An extention to show/inspect and analyze fonts in web-pages.
Website Color Changer
Extends the Developer Tools, adding a sidebar for colors manipulation
OctoLinker – Links together, what belongs together.
Interacts with Visual Studio extensions supporting Browser Link
Colored favicons for Salesforce
Make the favicon in different color based on which salesforce instance your are loggen into.
SEO Nofollow links highlighter
Highlight all nofollow links on any site you want. Excellent for SEO purposes.
WebMoney Advisor Next
Internet users feedback about the sites
TO Helper allows you speed up your daily work as Chat Mod.
Сервис подборки цвета
Shows the response times and uptime of a desired server. Useful to see how performs internet or a wireless access point.
Scanning website for vulnerable js libraries
Luminate Online Page Editor
Edit Luminate Online pages with just one click.
Alix allows you to lint your HTML for Accessibility issues simply by applying a stylesheet that makes use of advanced CSS selectors.