It’s mostly the “hobby” bit, which implies that this is one of your favorite, regular free-time activities. If you are someone who smokes weed a few times a year in social situations, that is a different situation.
A lot of people would find it difficult to be around someone who spends their time smoking unless they are really into it too. The smell especially can be really grating/annoying, and the person smoking often doesn’t realize because they have become smell-blind over time (similar to tobacco smokers).
Not a raspi, but I had similar issues on my opensuse HTPC which turned it to be related to issues with (or missing) media codecs in Firefox.
After (re)installing all of them, it worked like a charm.