Quiet TextFlip Panel от Pay

Quiet TextFlip Panel adds a minimal popup panel to the Firefox toolbar that lets users quickly reverse any text they enter.

It runs fully offline and requests no browser permissions.
The extension does not collect, store, or transmit any user data, and it does not interact with websites or browsing activity.

All functionality is bundled locally in the add-on package, making it lightweight, privacy-friendly, and easy to review.