Do you have flash content, an advertisement, photo, or other content that is supposed to fit in a div or iframe of a particular height and width, but it just goes over enough that Firefox or another browser decides it wants to show scrollbars? The fix is quite easy.

The easiest solution is to mask the problem not solve it. With this simple stylesheet.

   overflow: hidden;

Then in your html document simply refer to this style by setting the class of your iframe or div to “noscroll”.

<iframe src="" class="noscroll">
<div class="noscroll" id="myflashdiv">

There are other ways to actually “solve” the problem. I’ve found these much more complicated, but other css styles you may want to tweak are:
max-height, max-width, line-height, font-size, padding, and margin.