Recently got a new laptop and I've been using Firefox 7.0.1 for a couple of days. However, I noticed that I was getting some pretty slow speeds in general. Obviously the ISP or router would be the typical problem but one of these times the pages stopped loading completely and Firefox crashed. I decided to see if the same thing was happening on Internet Explorer and I tried to load a video on Youtube in both browsers when the lag started again. It loaded normally in IE but wouldn't at all in Firefox, despite refreshing the page. I tried other pages and IE is working fine.
It's not the speed of the program itself that's the issue, when it is actually running I agree it loads pages very quickly. The internet speed is suffering with Firefox though, haven't had this happen before.