>> FF is so buggy I have trouble understanding why people have so much biased pride about it....
You can skin it? 
buggy: can't really see that actually using FX since version 1.5. The current one (3.04) is very stable. I am always amazed on how different pages look on IE. I was on my friends computer looking at youtube and asked him "what's this?" He said - "oh that. That's an advertisement". 
So used to see clean pages!
If we're talking about features I could fill the whole page. 
In-page searching is solved soo much better in FX. Web standard compatibiliy is much higher - you only realize it when you start writing web pages. Also (unlike in IE) all the plugins are free and you can even ask the authors to put in new features (try that with IE). As security goes FX gets regular fixes, IE still has lots of security holes. The whole open source aspect is really good as you can look at the source code of your extensions to see whether they "phone home" if you are security conscious.
>> ... and what about addons, specially if you have the bad idea to want to uninstall all Firefox stuff
you can take all your Extensions with you using the FEBE extension - this can backup extensions / passwords /cookies / preferences / form history / themes.
Oh did I mention you can skin Firefox? 
And yes you can skin the tabs, too.
