Extensions
.no { CSS }
Opera 12 reminiscent Shift-G CSS zapper (use Alt-G)
Web Capture for Jira
Take a screenshot, annotate it and upload directly to Jira.
MultiPass
Automatically login to Basic Authentication using data based on URL regexp.
CF-Predictor
This extension predicts rating changes for Codeforces. It shows approximate deltas during and after the contest.
PageSpeed Insights
This will take the URL of the current tab and send it to PageSpeed Insights for a web performance analysis.
Selenium Page Object Generator
A nimble and flexible Selenium Page Object Model generator to improve agile testing process velocity.
Webfonting it!
The simplest extension for working with web fonts
Wayback machine website
Online service that have 452 billion web pages saved over time and who is domain tool in context menu
SEO Analysis with Seoptimer
Just one click to SEO Analysis with Seoptimer
Open in GIMP photo editor
Adds context menu items to send image links and image files directly to the GIMP photo editor
Right Click Validator
Right click on any webpage to validate it using the W3 NUValidator service.
NoFollow
Outlines nofollow links, detects nofollow and noindex meta tags on webpages. Features website filtering and custom CSS outline styles
Lorem Fill
A webpage form filler that populates context specific random test data into forms elements.
OctoLinker
OctoLinker – Links together, what belongs together.
GitLab - Tree view
Provides folder structure view for code in GitLab.
CSS3 Button Maker
Is CSS button code generator free easy tool that allows you create beautiful and elegant CSS web buttons in few clicks
CSS Shapes Editor
Interactive editor for CSS Shapes.
Internet Archive This
Submits the current tab to the Internet Archive (must be publicly accessible).
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
Nextsense PDF Signing Component
Signing PDF document.
Open in Vivaldi
Open current page, link, or all tabs in the Vivaldi browser.
Blendup
A tool for web developers to preview blend modes on different page elements.
PixelGrid
The tool to overlap your website layout with a grid.
Edit with Paint.Net
Adds a context menu item to send image links directly to Paint.Net photo editor
AMP Validator
Automatically checks each page for AMP validation.
W3C Markup Validation Service
This validator checks the markup validity of Web documents in HTML, XHTML, SMIL, MathML, etc.
Shuffle Extension Toolbar
Customize the sequence of extension icons as you like
sha1 hash generator
SHA1 hash generator (offline mode)
Modify O Tabs
Automatically pin or rename a tab of a site you specify or change its icon.
Edit with Sublime Text
Edit an HTML element and all its child nodes in Sublime Text editor with real-time updates
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.
Monitorito
This extension creates a real-time visualisation of your browsing activity