The only time I use Safari myself, other than testing of course.
My wife sells Mary Kay, and for some reason, she can't login to her account using Chrome on her machine, but Safari works, so she uses Safari for the one website.
That, and making sure the NSA gets its daily helping of your data! :-)
I doubt your choice of browser matters in that regard.
How would your browser choice affect that?
Better use Chrome instead. I only trust Google with my personal web browsing history.
Yep, that way both google and the nsa get my data! No need for backups at all.