Don't kid yourself for one minute that FF along with Chrome which I deleted from my computer a long time ago because of Google's BS adware crap doesn't have issues. Also FF is piss poor on updating and one has to keep up with their never inform you about any of their updates things yourself.
While I do not allow any IE updates except the ones I want and yes you can program IE to upload but NOT install them until you tell it to the updated and "fixed version of W8 = W8.1 with IE 11 is smooth and a easy browser to run. When they made W8 with IE10 I threatened to throw my computer away, they got it right with W8.1 and for anyone that got suckered into W8 the W8.1 is a free upgrade.
Yea yea, hear that and the Safari junk all the time, that's why I get lots of questions on how to make both work on Proboards V5, it doesn't like either.
Recently had a member on another forum tell me things weren't working right and they used both of these and when I asked them if they ever cleared their temp internet files, updated and restarted their computer they told me that they used safari and didn't have to do those things that the crappy IE users have to do. Said they hadn't restarted their computer in over a year and didn't even know how to check for safari updates or clear their files.
Told them if they didn't want to do what I said there was nothing I could do for them as far as PB V5. Long story short, they are now back on track with the never needs anything safari and apple.