I tried this once, but the terms are onerous, or they were when I tried it last. They expire frequently, they're huge (and I am on mobile broadband, which becomes very expensive if I run out of my data allotment in a month), they're limited in terms of versions.

Microsoft could change the game by open sourcing Edge, but I guess the key goal is getting all that user data, not having the best browser. (But, Google manages to get all the user data and have a mostly open source browser that people unbelievably have a lot of positive feelings about.)