I'm still using Firefox, just dread the day this feature comes back. It is now disabled in my settings, I just wish they make it optional instead of mandatory, because for my use case it brings serious stability issues.
I remember that phase, it was below-alpha quality. It's now okay, no fear to have, only some occasional hiccups like asynchronous errors (click somewhere at time T, click action triggered regarding the element at time T+x).
You can't use beta software and complain about stability issues.