This was just a one off experiment and I most likely won't publish any new version. I would instead recommend you consider using Fulguris.
You can download here a version of DuckDuckGo Privacy Browser for Android customised for your F(x)tec Pro¹.
Hide status bar in landscape
Fx Service is an Android application providing advanced features for your F(x)tec Pro¹.
Your Pro¹ is capable of detecting opening and closing of your case cover providing that it has been fitted with a carefully placed magnet.
Lock screen upon closing case cover.