Mga extension
Octotree
GitHub on steroids
FullScreen for Opera
Fullscreen, #1 Zoom and Dark Mode more options will get in one
Page Edit
Make any webpage into a content editable document and modify it via toolbar popup!
Custom Style Script
Add Custom JavaScript (JS) Code or Styles (CSS) to any page.
Youtube converter button - YTLoad
YouTube downloader FREE - Convert videos to MP3 MP4
Modify Header Value
Add, modify or remove a header for any request on desired domains.
Fontstorage
The simplest extension for identifying and selecting fonts on a website.
SeoQuake extension
SEOquake is a free plugin that provides you with key SEO metrics, along with other useful tools such as SEO Audit and many others
Image Resizer
Rescale multiple images into different sizes in a single step
Web Edit
Easily edit websites temporarily with a click of a button.
Disable Cookies
Disable cookies for current domain.
CSS & JS Injector
Easily customize your browsing experience CSS & JS Injector is a tool for developers, designers, and power users. Apply custom CSS styles and JavaScript to specific websites effortlessly. Boost productivity and customize the look, feel, and functionality of websites without altering its source code.
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!
MultiPass
Automatically login to Basic Authentication using data based on URL regexp.
PDF API HTML5
Mini SDK JavaScript and APIs library to create PDF file for web apps
IP Geolocation Lookup
IP Location Lookup by ipwhois.io
Wayback machine website
Online service that have 452 billion web pages saved over time and who is domain tool in context menu
JSON Formatter & Beautifier
makes it simple to read JSON Code for browser
Hex Calculator
Perform quick and accurate hexadecimal calculations — addition, subtraction, multiplication, and division with remainder — directly in your Opera browser.
Reddit to Mp4 converter | reditor
redditdownloader.us allows users to download Reddit videos with audio in high quality.
Edit the Page
Toggles the 'Design Mode' so that you can edit the contents of the page.
NPM Version Stats
Show npm package version usage statistics inline on the npmjs.com package page in the versions tab
Nextsense PDF Signing Component
Signing PDF document.
Picture in Play
Indicates whether the `picture` element is in use on a page.
TeamCity Notifier
Shows notifications about various events in TeamCity
CSSViewer
CSSViewer
BuiltWith Technology Profiler
Find out what the website you are visiting is built with using this extension.
Помощник диагностики
Network Information
Useful information about your system's connection including, type, speed, and rtt.
Random password generator
A simple random password generator for Opera browser
Caffeine
Keep awake which prevents the OS from automatically going to sleep, dimming the screen or starting screen savers
SelectorsHub
xPath plugin to auto generate, write and verify xpath & cssSelector.