Proton Mail encrypts the content of the mails, not the subject. So even if it is a Proton Mail-to-Proton Mail conversation the subject is not encrypted. Skiff also encrypts the subject of the mail in a Skiff-to-skiff conversation.

Well uhhh, kinda late, but the “original” openboard project hasn’t got an update in like, 12 months. There are forks, though.

Fork with glide typing - Haven’t received an update in 11 months https://github.com/erkserkserks/openboard

“New” fork: https://github.com/Helium314/openboard

OpenBoard, Florisboard, AnySoftKeyboard

THERE ARE ALTERNATIVES, PEOPLE!

Well, Mull is more like a “Librewolf for Android”, I (think) it is more privacy-focused than Fennec.
Mull also supports more extensions from developer options.

Check these out for Librewolf and Mull’s results. Fennec isn’t in the list (yet?)
https://privacytests.org/
https://privacytests.org/android.html