So, I've been running Firefox on my Yosemite iMac flawlessly since who knows when. all of the sudden, Firefox doesn't want to connect to the outside world. it acts like I have no internet connection even though Safari works just fine. Can anyone throw me a lifeline or two as to what could be wrong? I don't mind using Safari but I've grown to like FF over the years and I don't want to quit using it if I don't have to.