I am using FF 3.x, and I use no extension except that "flash player" thing.

I have tried reading about FF extensions, but there are SO MANY !!

Is there any FF extension that I should avoid? Meaning, dangerous, malware, etc??

Thanks.

if its on the firefox website it should be ok.

Just avoid the "experimental" extensions and you will be fine. You can read through the user reviews for each extension before downloading it.

i recommend foxmark...works well for me.
no more troubles keeping track wif my bookmarks and save me of all my hassle.

Thanks for the recommendation !

I will check it out.