Using the free version 2015.10.0.2208 on Win 7 64-bit, and Firefox 34.0.5.
When a scan is running, Firefox responsiveness gets quite sluggish (was not true on pre-2015 versions). Sometimes the Firefox window will completely disappear very briefly and whatever is behind where the window was becomes visible. This may happen more frequently if I am scrolling something in the Firefox window. I have never seen this when a scan is not running. Scrolling a Firefox window can get quite erratic if a scan is running.
I'm wondering if this is something that others are seeing too?
-- Larry