The default tab title is “Siberian – Backoffice”.
You can change it using your translations:
In the Backoffice > Settings > Translations, select a language and edit the backoffice.csv file. Find “Siberian – Backoffice” and translate it to what you want (for example “AppMaker – Backoffice”).
To change your favicon, you will have to replace “favicon.png” and “favicon.ico” in the files of your Siberian (at the root of the webspace).
Note: you may have to open your Siberian in incognito mode or in another web browser to see the changes.