The short version: Markdown Browser does not collect, store, or transmit any personal data or file contents. Everything runs locally on your device. No servers, no analytics, no tracking.
1. What data we collect
None. Markdown Browser does not collect any personal information, usage data, file contents, or metadata of any kind.
2. File access
The extension uses Chrome's File System Access API to access markdown files from folders you explicitly open. This access:
Requires your active consent through Chrome's built-in permission dialog each time a new permission level is needed
Is scoped only to the folder you select — the extension cannot access anything outside that folder
Is read-only by default — opening and viewing files never modifies anything
Requests write permission only when you initiate an action that requires it: editing a file, saving edits, creating a new file, or deleting a file. Chrome will prompt you to grant write access at that moment
Write actions (save, create, delete) are always user-initiated — the extension never modifies files automatically or in the background
Never transmits file contents anywhere — all reading, writing, and rendering happens entirely within your browser
3. Local storage
The extension uses chrome.storage.local and IndexedDB to save:
Your display preferences (font size, theme, reading width)
A list of recently opened file paths (names only, not contents)
A reference to the last opened folder handle (for convenience on reopen)
This data is stored entirely on your local device and is never synced or shared.
4. Network requests
Markdown Browser makes zero network requests. It has no backend, no analytics service, no crash reporting, and no update mechanism beyond the Chrome Web Store's standard extension update process.
5. Permissions explained
storage — saves your preferences and recent file list locally
tabs — opens and focuses the app tab when you click the extension icon
No other permissions are requested.
6. Third-party services
None. The extension does not integrate with or communicate with any third-party services, APIs, or SDKs.
7. Children's privacy
This extension does not collect any information from anyone, including children.
8. Changes to this policy
If this policy changes, the updated version will be published with a new date. Since no data is collected, changes are unlikely to affect your privacy.