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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
Serpstat Website SEO Checker
Instantly check your website's SEO, analyze competitors and get advantage of powerful search analytics in one place.
Baccarat Calculator
Baccarat Calculators is 3-in-1 tool for baccarat fans: baccarat odds, house edge, and commission calculator!
Baccarat Cheat Sheet
Baccarat Cheat Sheet is a 3-in-1 tool: basic rules, how to play guide, card values info, and 3rd card rules.
Siteimprove Accessibility Checker
Jumpstart your web accessibility efforts directly in Opera.
Random User-Agent
按时自动更改用户代理字符串，隐藏您的真实用户代理。
Color Picker
Search for the perfect color via an stylish color picker in a popup window.
Advanced Audio Equalizer
Enhance your online audio experience with the Advanced Audio Equalizer. Fine-tune your tab audio in real-time
Video & Audio Downloader
Easily download video & audio streams via toolbar popup.
SourceTraq: Git Repo Review Metrics
SourceTraq is your go-to tool for analyzing pull request trends, activities, and commit histories across multiple code repositories.
Shortkeys
Easily customizable keyboard shortcuts for Opera
DMARC Check
Check DMARC status for the current domain
Google Translate
翻译，字典，声音
ImTranslator: Translator, Dictionary, TTS
翻译，字典，声音
googleNewsModernLiteralizer
enables visited link colors on Google News (gN) for convenient browsing
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