I believe you... but what you are saying is not suppose to be true (especially about the <option> element). I have similar problems trying to match Chrome and Firefox. They don't agree about what is "top" of a line of text and they draw the text differently.
There are tons of CSS things now and the CSS reset pages I'm using do not bother with many of them.
The "tool tip" is a term used for two things so I don't know what you mean. If you mean the little pop up that says "Have a nice day" (or whatever), that is suppose to be either title or something else (which I can't recall but it seems like it was not browser agnostic). If you mean how the mouse changes from caret to pointer, that should be the css cursor attribute. Oh... I think now I know what you mean. On Firefox, it is displayed in the lower left of the page -- the destination of where the link will take you. I have no idea how to suppress that.
For browser specific stuff, I'd try asking in a browser specific forum (e.g.
http://forums.mozillazine.org/ for Firefox). I get spotty results from stackoverflow.com There are other forums similar to Stack Overflow.
I'm still hoping someone else will chime in to our discussion with golden words of wisdom.