For a very long time I've been using Firefox Preview for Android and its unique feature (among android browsers) to set a picture directly from the website as contact picture. I would do that by tapping-and-holding on an image to get the context menu and select the "Set image as..." option. It allowed me to save any image as background or contact picture. It appears to me, that this option has been removed from the context menu in a recent update of Firefox Beta. Anyone knows more about this? Would love to have this feature back...!