I believe that most “Firestone Service Centers” are affiliated franchises. It is unlikely that Bridgestone/Firestone owns or operates any of these stores.
Multiple liberal AGs have been trying to force franchise operations to own up for all mistakes of franchise operators (see the efforts against McDonalds).
While there may be actual problems with any individual repair center, to hold Bridgestone/Firestone personally responsible for it is strictly grandstanding and a money/PR grab.
Yeah, I think you’re right that the parent company has nothing at all to do with this kind of garage. Like I said earlier, it only takes an unscrupulous, greedy mgr and the whole place can go into ripoff mode. but it’s certainly not sanctioned by Bridgestone/Firestone. The independent franchisees are responsible.