Every time I try to use "Gumtree" Australia, Firefox becomes sluggish and lags very badly, and when I try to click on an ad to view it, something comes up telling me that a script has stopped working, and then Firefox crashes. Firefox has been lagging a lot lately, but Gumtree is the main one that seems to set it off. Everything is up to date, so I don't know why this is happening. I've tried using Gumtree in Internet Explorer and it works fine there, but I don't really like using IE at all.