Any insight on this for mobile?
Oprah vs Firefox vs chrome
Chrome doesn't really allow adblocking, while the other 2 do, oprah has is built in.
Chrome and opera have data savers built in, while firefox has extensions that will do an ok job.
There are many differences, depends on what you want.
I left chrome when it was getting to heavy for the phone I had then and went to Firefox. I got used to the no ads (with an adblocking app), and they had built built in data savers then.
Once they removed the built in data savers and the extensions weren't doing a good enough job for me, I went to opera.
It's not perfect, but I use chrome when opera won't do the job