Privacy Policy
Last updated: 2026-04-23
Mouse Sprite is a browser extension published by Tianyu Jiang. This policy explains exactly what happens to your data when you use it.
Data we collect
We collect nothing. Mouse Sprite has no server of its own. No usage data, telemetry, crash reports, or personal information is transmitted to the publisher or any analytics provider.
Data you supply to the extension
The following is stored only in your own browser via the standard chrome.storage APIs:
- Settings (
chrome.storage.sync): API base URL, API key, model name, temperature, max-tokens, stall threshold, language. - Interaction history (
chrome.storage.local): your questions, selected page context, AI responses, timestamps. - Tracked concepts (
chrome.storage.local): concepts identified by the AI and how often each is asked.
This data never leaves your browser profile. Chrome's native account sync may replicate the chrome.storage.sync portion across your own devices; it is not visible to us.
Data sent to your chosen LLM provider
When you ask a question, your browser makes a direct HTTPS request to the LLM endpoint you configured (OpenAI, DeepSeek, Ollama on localhost, etc.) containing your text, surrounding page context, a summary of recent queries, and your API key. This request goes directly from your browser to your provider β the publisher never sees it. What the provider does with that data is governed by their privacy policy.
Permissions we request and why
- storage β save your settings and history locally.
- activeTab β reload the current tab from the toolbar popup.
- host_permissions: <all_urls> β let the learning sprite appear on whatever page you are reading.
Your rights
- Open settings and click Clear history & knowledge gaps to wipe everything local.
- Uninstall from
chrome://extensions; Chrome removes all associated storage automatically.
Contact
For questions about this policy, email jiangtianyu.jty@gmail.com.