Phorge first trying to check a User Agent string (which seems a bad idea in 2025, plus things did change) in [PhabricatorStandardPageView.php](https://we.phorge.it/source/phorge/browse/master/src/view/page/PhabricatorStandardPageView.php) by setting `$device_guess`. Again, this seems a bad idea in 2025.
Then Phorge applies some CSS rules sometimes based on that check and/or sometimes based on viewport width.
Screenshots of Firefox 138 on an Android 10 system:
{F4286114}
{F4286115}
Screenshots of Firefox 91 on a Sailfish system:
{F4286128}
{F4286129}
Chromium on Android also seems affected (though the User-Agent regex still seemed to match) but I didn't receive screenshots from folks.