Posted on 23/03/2007. By Pete Otaqui.
Firefox seems to reload plugins, for example flash and quicktime, when the window is resized, but only under certain circumstances.
If the scrollbars change (from being there to not being there or vice versa) then the effect occurs, as it apparently does if you alter a containing element’s css position from absolute to relative.
The issue seems to be cross-platform and specific to Firefox.