Ekstensi
Octotree
GitHub on steroids
ModHeader
Modify HTTP request and response headers
WordPress Theme and Plugins Detector
This tool detects theme and plugins used on WordPress sites and displays information about them.
Live HTTP Headers
Monitor all HTTP/HTTPs traffic from your browser.
RDS bar
Quick SEO analysis of websites and pages, designed for webmasters and SEOs.
Block Yourself from Analytics
Block your Google Analytics™ activity for the websites you own, no more false stats.
PDF API HTML5
Mini SDK JavaScript and APIs library to create PDF file for web apps
SEO-tools
NetworkMonitor
Shows the response times and uptime of a desired server. Useful to see how performs internet or a wireless access point.
OCR - Image Reader
A powerful optical character recognition (OCR) extension to capture and convert images to text
Edit the Page
Toggles the 'Design Mode' so that you can edit the contents of the page.
Live editor for CSS and LESS - Magic CSS
Live preview of CSS/LESS code with an in-page editor. Autocomplete, convert LESS to CSS, beautify, minify, CSS reloader, linter, ...
Google Analytics Debugger
A browser extension for debugging Google Analytics tracking code
stylish-hub
A browser extension that brings a new GitHub experience
Browserling - Cross-browser testing
Cross-browser test websites in the most popular browsers such as Internet Explorer, Edge, Chrome, Firefox, Safari and Opera. Try for free!
Edit with Adobe Photoshop
Adds a context menu item to send image links directly to Adobe Photoshop photo editor
ChroPath for Opera
AutonomIQ offers a developers platform ChroPath to generate and validate unique selectors like relative xpath with iframe support
HTTP Headers
Quickly view the HTTP headers of the current tab.
CF-Predictor
This extension predicts rating changes for Codeforces. It shows approximate deltas during and after the contest.
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.
AddJS
This extension allows you to add your own custom website specific JavaScript.
Random password generator
A simple random password generator for Opera browser
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
SEO Analysis with Seoptimer
Just one click to SEO Analysis with Seoptimer
Right Click Validator
Right click on any webpage to validate it using the W3 NUValidator service.
JavaScript QR Code
Make QR Codes in JavaScript
Webmaster menu
Adds new items to browser context menu that open various analyzes of browsed web pages and sites.
Lorem Fill
A webpage form filler that populates context specific random test data into forms elements.
Web Capture for Jira
Take a screenshot, annotate it and upload directly to Jira.
Nextsense XML Signing Component
Signing XML document.
Modify Header Value
Add, modify or remove a header for any request on desired domains.