Rated 5 out of 5 stars
Thank you for the latest update. Saved Password Editor now looks much nicer :)
I think you can remove "Close" button from the bottom of the window. This button available in the caption of this window.
If by the "Close" button. you mean in the Saved Passwords window, please understand that I didn't write that window. It's part of the Mozilla Toolkit that is available to every application that uses that toolkit. I don't want to modify it much more than necessary. Besides, if I were to remove that button, there might be unforeseen consequences for someone who relies on its presence (I'm thinking along the lines of accessibility or something).