Great thread!: https://www.physicsforums.com/threads/micromass-big-integral-challenge.867904/#post-5450007 I have a 16GB i7 windows 7 box with Firefox v45.0.2. I have NO add-ons to Firefox. Every time I open the one thread, it takes longer and longer - literally a minute the last time. No other threads do that from PF or elsewhere. While freezing the PF window, everything else on the box is happy, the window simply becomes unresponsive for 60 seconds or longer. Me, PF, or should I blame my dog? I'm guessing there is some sort of issue with Latex rendering. Dunno.