One of the (new?) features I found when I installed the recently released Safari for Windows was the ability to set a minimum font size. This is quite useful when very small font sizes are used on sites. However, Firefox is my primary browser, and I was not aware of any similar functionality for minimum font size till I came across this post on Mozilla Links. Apparently, the minimum font size can be set in Firefox through Options->Content->Fonts & Colors (Advanced)->Minimum font size.
Setting a minimum font size could create problems in certain cases – mostly with the page formatting I think. But, it is still useful to have this setting. Also, as per the post Firefox 3 is supposed to bring the ability to remember the zoom level (adjusted using Ctrl+/-/mousewheel in most browsers) for different
pages.
AB's Reflections 