I kinda wish for some help with this as it bothers me from time to time.
Whenever I am viewing an image directly (using the direct link which ends in the image's file type like .png or .jpg instead of .com), it now removes the transparent elements of images (that has it) and fill in the empty area with a grey color. Firefox didn't do this before but then I allowed it to finally update itself and now it is doing this... And I find it to be rather annoying.
So is there anyway to fix this to be like before?
~Edit~
Nevermind... Finally found https://addons.mozilla.org/en-US/firefox/addon/transparent-standalone-imag/ after searching for so long.