Firefox snap : how to open files read-only by default ?

Hi all !

I suppose it’s more related to an interface, but I don’t know which one… personal-files maybe ?

Each and every time I have to open a file in the Firefox snap, a file browser interface opens, with a checkbox at the bottom left to open the files read-only. The checkbox is always unckecked by default, i.e. if I want the files to be guaranteed opened read-only, I have to check it.

Most of the time however, writing to the file is not expected. That’s why I’m wondering, is there an attribute I can change in some interface, so that the read-only checkbox is checked by default ?