Data stored on your device
Paper metadata, collections, notes, annotations, conversations, paper memory, settings, and reading progress are stored locally in IndexedDB. Offline PDF files use OPFS.
Google Drive sync
Sync is optional and begins only after you connect a Google
account. Margino requests the minimum
drive.file scope and stores encrypted objects in a
visible PaperFlow folder in your Drive. Offline PDF
backup is separately controlled and off by default.
AI requests
When you submit a question, the text you provide and the bounded paper context shown by the product are sent to the AI provider you selected. Margino does not proxy those requests through a Margino-operated server.
Credentials
Google OAuth tokens remain under Chrome Identity management. Optional API keys are stored by the native host in macOS Keychain, Windows Credential Manager, or Linux Secret Service, not in extension storage.
Local processing
PDF rendering, search indexing, and OCR run locally. OCR workers, WebAssembly, and language data are bundled with the extension; the extension does not load executable code from a CDN.
Control and deletion
You can disconnect Google Drive, remove local records, delete offline PDFs, or delete the Margino folder from your own Drive. Uninstalling the extension removes Chrome-managed local extension data; Drive files remain under your account until you delete them.
Support and security
For product support, use GitHub Issues. For a suspected vulnerability, follow the security policy and do not disclose credentials or private papers publicly.