How so? What makes the context menu different on FR?
I often right-click and pick "back" or "reload" from the context menu.
The problem with recent FF versions is that only the top and right outlines of the context menu appear. It will finally work after several consecutive attempts. It appears to correlate with the mouse position over a table or image.
This bug manifests sporadically on various websites, but its pretty consistent here on Free Republic.