Here is my woeful tale. Bought my MBA 3 months ago. My wifi connection at home is and always has been rock solid. I know this because my iPhone, work laptop and smart TV all work just fine with my wifi. But not MBA. I could browse for hours and it would work fine some days. Other days it would crash every 15 minutes. When it crashed all I could do was restart my router. Being busy with work and all I kept putting off doing anything about it, but finally last week I got sick of it. I started by calling my ISP because I thought they might have some helpful tips. Turns out my router was getting old so they sent a guy to the house to replace it. After that I couldn't get on the internet at all with my MBA. It would just say "Failed to open. You are not connected to the Internet." I could see that it was connected to the wifi network but it just wouldn't bring up the Internet. Again, my iPhone, work laptop and smart TV all worked just fine on the wifi network. To make matters worse, my MBA could connect to my Verizon hotspot and browse just fine. So the problem seemed to be that my MBA just couldn't communicate with the home wifi network for some reason. I tried calling Apple but didn't want to pay extra money for advice on something that should be working correctly after i just bought this thing 3 months ago. I called the Geek Squad since I have the extra software/hardware protection plans through BestBuy, but they were not helpful at all (accidentally hung up on my twice, put me on hold for 35 minutes each time I called back, and in the end couldn't help at all). After thinking about it for a LONG time, it occurred to me that the problem was an inability to browse - therefore maybe the problem wasn't the MBA but instead maybe it was the browser itself. Suddenly, it all came into focus. Safari is a tragic pain in the butt as everyone know but could it really be so bad that it's actually not letting me connect to the internet at all? I didn't get it until right at that moment that Safari was also the root of the problem with the crashing router, not the MBA. So I uploaded Google Chrome and my internet service came roaring back to life.
Never ever ever again will I use Safari. I'm also noticing that little things that had been missing or non-functional with various accounts online are not working just fine again. ****, that Safari is baaaaaad.