Sometimes when a page is loading slowly in Firefox, my Windows 7 laptop will freeze (become completely unresponsive) until the page has finished loading. I don’t know the causality here, i.e., whether the slow load leads to the freezing, or vice versa. Or perhaps a third factor is causing both? A typical scenario would be that, during the first five seconds the page is loading, I can move the mouse cursor, but nothing will respond to it at all, i.e., no clicks will “take” (and that applies to both Firefox *and* any other functions). Then, for the next five seconds (the length of time it takes for the page to finish loading) the cursor itself will also be frozen in place, unmovable. Then the page will finish loading, and the system will instantly become fully responsive again. This is something that used to happen maybe once or twice a month, but now it is happening more often --- still sporadic though, with occurrences ranging from 15 minutes apart to 5 or more hours apart. While this is a bit of an annoyance, I guess I’m even more concerned that this freezing might create (or reflect) a vulnerability to malware. Antivirus and Malwarebytes scans come up clean, as does a chkdsk of my hard drive (including for bad sectors). I see no error messages in Windows Event Viewer, or entries in my firewall, correlated to the times the freezing occurs. Graphics drivers are updated. I haven’t seen the same issue in IE, but then again I use it far less than Firefox. Other than this, the laptop, including Firefox, seems to be operating normally. Any ideas?