You can report bugs, suggest new features or translate the app.
You can review the app on Google Play or, if you want to support the developer, you can "buy me a coffee" on LiberaPay, PayPal or Ko-fi.
I need the app statistics just to know how many people use the app each day.
In this way I can dedicate more (or less) time, based on users number.
The app is not developed by Mozilla, it's developed by Saverio Morelli.
I develop the app just to improve the project, without any earnings. You can support my work buying me a coffee on LiberaPay, PayPal or Ko-fi.
F-Droid is a store managed by users, so the updates can take some days (or weeks) to arrive
The app has "check for updates" feature, so you can know when there is a new version of the app, and you can download it from GitHub, if you prefer.