id,summary,reporter,owner,description,type,status,priority,milestone,component,version,severity,resolution,keywords,cc,focuses 21455,HiDPI (retina) theme custom backgrounds,nacin,joemcgill,"We should support HiDPI custom backgrounds. This will be a bit easier than custom headers, #21389, as we can do a media query in _custom_background_cb(). Worth noting that we will still need to solve some aspect of retina uploads, #21038.",enhancement,closed,normal,,Customize,,normal,maybelater,close,,