I would assume they’re good developers, making a predefined and by now long time supported
transform look correctly after the snapshot. But one could always try to check with this:
From what I read, Opera Mini should be included:
I’ve personally been ignoring that browser so far… hardly ever is the caniuse reference not in the red when I check a particular feature.
Edit – I think the first link is wrong, Mini seems to need another file that’s rather hard to find.