Why is Firefox painfully slow/unresponsice when I return from a website to a search list?
If I do a search, and open a website off the search results in Firefox, then close the website to return to the list, Firefox is completely unresponsive for a period - won't return to the pointing hand, just an arrow, which does nothing. It has been like this for a while. I thought it might be Kaspersky 2013, but switching it off makes little difference. It is so slow that it makes Firefox almost unusable.