I prefer clean, static documentation (like: http://docs.python.org/)
What Firefox addons are you using?
Are you in Windows or Linux or Mac?
Firefox is slow as hell for me on Ubuntu (like a lot of things) but fast on Windows.
Also try turning off adblock and firebug.
Firefox 10.0.2 on Windows 7 X64. Only addon is adblock plus.
Clicking "python (beta)" at the top results in a stop script after about 10 seconds.