Weird Firefox / Chormium behavior in forms plus flash issue

Hi

Yesterday something weird started to happen in firefox: I can't login in to Facebook, because I can't see the form labels and I can't write nothing into the text inputs. (Note : I can see the labels in the HTML sourcecode)

I've check some other logins forms as twitter, google, and they look ok, but when I was trying to post in this forum this issue, I realize i couldn't do it also (see the image bellow), so I presume that yesterday, I could see the forms, possibly I wouldn't be able to pass nothing in the input fields.

Only Konqueror can do it.:\

Today, apart from that, firefox wouldn't play youtube videos.
So I try installing chromium, but same problem.

Konqueror , for some reason keeps functioning ok ! :\

So, I've remove firefox, chromium and everything about flash that I could find. (by the way, removing this packages, I'm forced to install Thunderbird, and if I want to remove Thunderbird, I'm force to install Firefox ???)

Now, I have Firefox working with flash but I can't fill forms

I've just installed