Every time I install Chrome on my machine (for testing purposes), macOS decides that Chrome is going to be the default file handler for a bunch of file associations, including HTML, WebP, and so on… and I have to figure out which was which for all of the mappings (which is super frustrating).
I can read Info.plist from the bundle of the specific app (in this case, Google Chrome) that declares all of the UTIs, and then figure out which file associations that Chrome has messed up, but I don’t know how to get the default file associations (if it was not Chrome) before it.