Gemma 4 runtime, from source to GPU.
Everything below is checkable against the shipped extension rather than taken on trust — the model identifier survives into the compiled bundle.
01 // Runtime
What is actually shipped
The model identifier is part of the extension source and remains visible in the compiled bundle, making the shipped runtime easy to verify.
| Technical layer | Implementation |
|---|---|
| Model | Gemma 4 E4B Instruct · gemma-4-E4B-it-web.litertlm |
| Source definition | src/offscreen.ts:12 |
| Model URL | https://huggingface.co/litert-community/gemma-4-E4B-it-litert-lm/resolve/main/gemma-4-E4B-it-web.litertlm |
| Compiled bundle | dist/offscreen.js:1207 contains the same Gemma 4 model URL |
| Runtime | @litert-lm/core 0.15.0 · local WASM runtime assets |
| Execution | LiteRT-LM + WebGPU · Chrome offscreen document |
| Model storage | Downloaded once from Hugging Face · persisted with the browser Cache API |
| Text processing | Skipped article text is summarized on-device and is not sent to a hosted LLM API |