Leudachain
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
Font Inspector
Click on any HTML element to get the font info in a popup!
Disable Cookies
Disable cookies for current domain.
GrabzIt Web Scraping Assistant
Create Web Scrapes online easier than ever before with GrabzIt's Web Scraping Assistant.
Custom Style Script
Add Custom JavaScript (JS) Code or Styles (CSS) to any page.
BuiltWith Technology Profiler
Find out what the website you are visiting is built with using this extension.
JSON Formatter & Beautifier
makes it simple to read JSON Code for browser
Fontstorage
The simplest extension for identifying and selecting fonts on a website.
Youtube converter button - YTLoad
YouTube downloader FREE - Convert videos to MP3 MP4
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.
Caffeine
Keep awake which prevents the OS from automatically going to sleep, dimming the screen or starting screen savers
PIX Studio Plugin
PIX RPA Studio Plugin
Web Edit
Easily edit websites temporarily with a click of a button.
CSSViewer
CSSViewer
Edit with Adobe Photoshop
Adds a context menu item to send image links directly to Adobe Photoshop photo editor
IP Geolocation Lookup
IP Location Lookup by ipwhois.io
Network Information
Useful information about your system's connection including, type, speed, and rtt.
Picture in Play
Indicates whether the `picture` element is in use on a page.
Random password generator
A simple random password generator for Opera browser
View Page Source
Get access to the page source with the click of a button.
Wayback machine website
Online service that have 452 billion web pages saved over time and who is domain tool in context menu
Image Resizer
Rescale multiple images into different sizes in a single step
Hex Calculator
Perform quick and accurate hexadecimal calculations — addition, subtraction, multiplication, and division with remainder — directly in your Opera browser.
NPM Version Stats
Show npm package version usage statistics inline on the npmjs.com package page in the versions tab
Yandex Wordstat Regions
Расширение, возвращает полное дерево регионов РФ в сервис подбора слов Яндекс (wordstat)
RestMan
RESTMan is a browser extension to work on http requests.
retire.js
Scanning website for vulnerable js libraries
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, ...
(X)HTML5 Checker
A small extension to validate the markup of current tab
Gridify - Keyboard Link Selector
Select any link, image, input box, or a selectable region on the current page without using the mouse just by a few keyboard hits
Modify Header Value
Add, modify or remove a header for any request on desired domains.
Rabbit URL Opener
Rabbit URL Opener (Rahul Digital) - Bulk URL's Opener Extension just lets you open multiple URLs at once. More about Rabbit URL Opener http://rahuldigital.org/url-opener/ http://rahuldigital.com/url-opener/