I want to sandbox things like Steam, Discord and even firefox and I see bubblwrap getting recommended a lot as the preferred sandboxing tool but I’m hardpressed on how to actually use it. I don’t know what to enable and what not to.
PS. Please don’t recommend Flatpak, I’m aware Flatpak uses bwrap but I want to avoid Flatpak unless absolute necessary. I don’t have anything against Flatpak, just personal preference :D.
I don’t use it so I don’t have first-hand experience. Like I said, the wiki has some examples and links for reference.
FYI firejail comes with bundled configs for the three apps you mentioned among others. It should play with little or zero tinkering. Maybe give firejail a try if you find bubblewrap hard to setup.