Could it be anything to do with your browser cache set low?
It could - I will x4 it from 50MB to 200MB and see if that makes a difference.
Please remember of course that you have to have enough free pupsave memory for that size of cache. I would want double the cache size just to be sure. Remember also that we changed the Firefox default from 200MB cache (I think) down to 20.
I personally do not think you are running out of cache--FF should certainly be smart enough to handle whatever size you give it. But on the other hand, I know you have been troubled by this repeatedly, so I am interested in the result of your experiment. Have you tried linking /root/.mozilla to a folder in /mnt/home?
And does this happen with other browsers--even if you prefer FF that might be worth a try, Iron 6 or 7 or Opera perhaps.