I have a samsung galaxy S4. This has been an ongoing problem from the moment i installed firefox months ago. Every time I try to download a photo from the internet using firefox, the picture is unsuable once it's on my phone. I have tried multiple methods of download ("save as" & "save link" when available). As well as trying multiple methods of opening the picture once downloaded ("gallery" & other third party extensions). Clearly the problem is with firefox. This is a real let down because the desktop version is amazing.