Browser extensions

Browser extension AI chat exfiltration is the practice of browser extensions, primarily distributed through the Chrome Web Store, reading the content of users' conversations with AI chatbots such as…

SimilarWeb (legally Similarweb Ltd.) is an Israeli digital-market-intelligence company that owns two Chrome Web Store extensions independently documented exfiltrating their users' browsing data…

StayFocusd is a productivity Chrome extension published by mobile-analytics company Sensor Tower that, as of May 15, 2026, advertises both a "Gen AI Analytics" feature tracking users' "usage of AI…

Stylish is a Chrome & Firefox browser extension for applying user-written CSS skins to websites, originally written by Jason Barnabe as an open-source project & in circulation by January 2006 when…

WhatRuns is a Chrome and Edge browser extension, published by UK company Owned it Ltd, that identifies the frameworks, fonts, content management systems, plugins, and analytics tools running on any…