Diễn đàn hỗ trợ Firefox dành cho Android

I realize that if a file is served with mime type Content-Type: application/pgp-encrypted, then its extension is changed by Firefox on Android to ".pgp". Apparently, Firefox for Android likes to modify extensions based on mime type.

Can this behavior be disabled?

I need to build firefox android with an extension installed. I'm trying for ublock origin now but I'll use my own extension later. I do not plan to submit this or whatever,it'll be local. How can I do it?