I use it for everyday things like schoolwork and gmail and it works great so far. I still have Librewolf on the side but it seems like it’s for more privacy and that you’re not supposed to change it too much for example adding more extensions or it defeats the purpose of it.
I once got a pop up ad on an old tablet where the person in the image looked a lot like me. It was so bizarre. I thought it was some AI generated ad. This was like 3 years ago though and I didn’t have Facebook anymore.