Today I opened this fancy photo website of a friend. It has horizontal scrolling of pictures. In Firefox I cannot scroll horizontally without first using the cursor keys. The same happens in Safari. The horizontal scrollbar shows for a second, and if I hover over it, a bigger scrollbar appears and that one stays even longer, like 10 seconds. Then it disappears and I have to use the cursor again.
In my opinion this is a GUI failure by either Apple or Mozilla, but besides complaining I want to have this fixed. I want to see a horizontal scrollbar whenever I hover over the bottom border of the page in Firefox, if (and only if) the page is wider than the browser window. Can this be done?