PWAsForFirefox is uses main browser properties or not?

[mitat678]

discussion main sentence: i want to use optimization features of Mercury browser (firefox fork) as pwa.
main question: PWAsForFirefox is uses main browser (that extension installed) properties or seperate firefox, if not then is possible to do it?
because: this browser extension (and extra parts of extension that microsoft thing program, .exe's in folder) uses firefox runtime to run pwa.
specs: windows 11, installed extension like how install guide page said.
looking for any help!

edit: it looks doesnt uses main browser properties so i need a solution for that!