Multi Sign Editor does not collect, store remotely, sell, or transmit personal information, telemetry, or analytics.

The extension accesses Thunderbird account identities only to display and update their signatures. Its local storage contains only the id of the last selected identity. Backup files are created locally at the user's explicit request and are saved through the browser's normal download mechanism.

The extension makes no network requests. If a user inserts a remote image URL into a signature, Thunderbird or the recipient's mail client may request that image when displaying the signature. Multi Sign Editor does not control or proxy that request.

Last updated: 2026-09-08.