Gemma Gem: Browser Extension Runs Google's Gemma 4 AI Model On-Device via WebGPU
By
ikessler
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Summary
Gemma Gem is a browser extension that runs Google's Gemma 4 AI model entirely on-device using WebGPU technology, eliminating the need for API keys, cloud services, or data leaving the user's machine. The extension functions as a personal AI assistant within the browser, capable of reading web pages, clicking buttons, filling forms, running JavaScript, and answering questions about visited sites. Setup requires loading the extension in Chrome's developer mode, and usage involves clicking a gem icon to open a chat interface where users can interact with the AI model after it loads.
Key quotes
· 5 pulledGemma Gem runs Google's Gemma 4 model entirely on-device via WebGPU — no API keys, no cloud, no data leaving your machine.
Your personal AI assistant living right inside the browser.
It can read pages, click buttons, fill forms, run JavaScript, and answer questions about any site you visit.
Wait for model to load (progress shown on icon + chat)
Ask questions about the page or request actions
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