User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:11.0a2) Gecko/20120115 Firefox/11.0a2 Build ID: 20120115042009 Steps to reproduce: After a recent Aurora upgrade, I opened an image file in the browser, such as http://www.bom.gov.au/radar/IDR363.gif Actual results: The image no longer displays in the top-left with the default background colour, but rather centred in the middle of the screen with a dark grey background colour. It is difficult to read some of the text because of the dark background colour. Expected results: It should have used my default background colour (which is light purple), or at the very least in Edit | Preferences | Content | Colours... there should be a way to change it to something other than very dark grey. Or perhaps the transparent parts of the images should appear as the default background colour instead, then the dark grey surround wouldn't be a problem.