maybe you got some weird antivirus.. or malware, or bad dns...
I run Firefox on my OLD and slow x120e, and everything works fine..
Probably a software issue.. but since it affects your mobile device, i'm thinking it's either ur ISP or your router..
Of course it could also be that you're on some sort of NSA watch list, and therefore they're screenin' ur stuff..
Been a bad.. boy..?