Разширения
DNS Checker - SEO and Domain Analysis
SEO and Domain Analysis Tool by DNS Checker. Provides SEO Report, Meta Redirects and 404s, Client IP, Domain IP & Geo Location, etc
Right Click Validator
Right click on any webpage to validate it using the W3 NUValidator service.
PageSpeed Insights
This will take the URL of the current tab and send it to PageSpeed Insights for a web performance analysis.
HTTP Headers
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
OctoLinker
OctoLinker – Links together, what belongs together.
fonts infos
An extention to show/inspect and analyze fonts in web-pages.
Website Analysis & SEO Tool
Website SEO audit tool that provides website analysis in SEO, performance, validity, security, accessibility and other criteria.
JavaScript QR Code
Make QR Codes in JavaScript
Edit with Paint.Net
Adds a context menu item to send image links directly to Paint.Net photo editor
W3C Markup Validation Service
This validator checks the markup validity of Web documents in HTML, XHTML, SMIL, MathML, etc.
Open in Vivaldi
Open current page, link, or all tabs in the Vivaldi browser.
PixelGrid
The tool to overlap your website layout with a grid.
SelectorsHub
SelectorsHub helps to generate, write and verify the XPath & cssSelector.
Rabbit URL Opener
Rabbit URL Opener - Bulk URL's Opener Extension just lets you open multiple URLs at once
WebMoney Advisor Next
Internet users feedback about the sites
Lorem Fill
A webpage form filler that populates context specific random test data into forms elements.
retire.js
Scanning website for vulnerable js libraries
Webfonting it!
The simplest extension for working with web fonts
Open in GIMP photo editor
Adds context menu items to send image links and image files directly to the GIMP photo editor
ChroPath for Opera
AutonomIQ offers a developers platform ChroPath to generate and validate unique selectors like relative xpath with iframe support
JIRA Template Injector
The description field of new JIRA issues will automatically be populated with a template relevant to the issue type
Sitemap Explorer: Check and View XML Sitemaps
This extension helps you find, inspect, export, and view XML Sitemap files for any site you navigate in a browser.
.no { CSS }
Opera 12 reminiscent Shift-G CSS zapper (use Alt-G)
DomainUserAgent
This extension changes the UserAgent sent by your browser on a per-domain base. You can set up a different UserAgent for a specific domain, but still use the default one otherwise.
CF-Predictor
This extension predicts rating changes for Codeforces. It shows approximate deltas during and after the contest.
Check Wordpress Version
WordPress Vulnerability Scanner - Scan for vulnerabilities, version, themes, plugins and much more!
Tabby Extension
Easily add BookMarks to Tabby from your preferred browser!
TechsFound
Find Running Technologies on Website
MultiPass
Automatically login to Basic Authentication using data based on URL regexp.
Involta Short links
Сервис сокращения ссылок
Colored favicons for Salesforce
Make the favicon in different color based on which salesforce instance your are loggen into.