Apparently, there’s an in-the-wild exploit for Firefox that can steal passwords from the in-built Password Manager. In an article I read, Daniel Veditz, a Mozilla developer said:
Up until now, browser makes [sic] have focused on user convenience and assumed sites with valuable passwords would be well-written. But they have bugs just like we have bugs so we might have to be more defensive.
Um, can you say, duh!?
I admit that I use Firefox pretty much exclusively, but if all Mozilla developers are making more naïve assumptions like this one, I might install IE7 after all...