# nico-martin/gemma4-browser-extension

On-device AI agent Chrome extension powered by Transformers.js and Gemma 4

Repository: https://github.com/nico-martin/gemma4-browser-extension
Canonical: https://ross.abutalabs.com/products/gemma4-browser-extension
Language: TypeScript
License: MIT
License Family: permissive
Last push: 2026-08-13T12:21:19+00:00

## Health v2 (maintenance only)
Score: 60/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 97, release rhythm 35, longevity 20
- inputs: {"age_days": 293, "days_push": 20, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1156, forks 189 (observed 2026-08-28T04:03:47.979059+00:00)

## What it is
A Chrome extension that runs an on-device AI agent powered by Transformers.js and Gemma 4 via WebGPU, entirely locally with no data sent to servers. The agent can manage tabs, answer questions about webpage content using RAG with embeddings, and semantically search browsing history stored in IndexedDB.

## Use cases
- control browser tabs with natural language commands
- ask questions about the current webpage privately
- search browsing history semantically instead of keywords
- run an AI assistant fully offline in the browser
- highlight relevant sections of a webpage with AI

## When to choose
- you need a privacy-first AI assistant with all inference on-device
- you want an agent that can navigate and interact with browser tabs
- you want semantic search over webpage content and browsing history

## When to avoid
- you need a powerful cloud-scale LLM rather than a small on-device model
- you use a browser without WebGPU support
- you want a production-distributed extension rather than a developer-built one

## Facets
- artifact type: plugin
- maturity: active
- function: agent-framework, rag, llm-inference, chatbot, vector-database, browser-extension
- domain: browser-extensions, artificial-intelligence, privacy
- platform: browser, browser-extension, wasm
- tags: transformers-js, gemma, on-device-ai, webgpu, chrome-extension, semantic-search, local-inference, ai-agents, natural-language-processing, gpu

## Member repositories
- nico-martin/gemma4-browser-extension (main) score 60

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:03:47.979059+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T06:32:08.746066+00:00, confidence not recorded.
  - readme: https://github.com/nico-martin/gemma4-browser-extension (fetched 2026-08-28T04:03:47.979059+00:00, sha db64796c5e85)
- Data as of 2026-08-30T08:39:29.467469+00:00.