On two computers:
Firefox, latest version
Avast Free, latest
Comodo firewall, latest
Sandboxie, latest
One computer is win7 64 bit; the other is Vista 32 bit.
Some sites work and some times sites just sit there "not responding and then this pale white comes over the screen.
Happening a lot on both computers as of when the Avast was program updated a few days ago.
Sometimes a site will work or not, like in facebook and elsewhere. May have to do with something specific sometimes loading on the sites.
Sometimes I see the Avast icon turning and sometimes it is not turning when this happens.
I know better than to call cust support because last time Avast made a problem (and later fixed it) cust support tried to blame me for having anything on the computer except only Avast and tried to make me buy expensive services; they were awful.