Noticed that Mozilla decided to change how a single image is shown in the browser.
For example, here is how CNN’s header image looks like now:
The old way was to show the image at the top left with the default white background. My issue with this is that users are used to thinking that empty white space is default and any color or customization (like centering) is done by the webpage (and not the browser). But in this case, we are not looking at a webpage, but rather just an image downloaded via HTTP. Also some websites tend to use this new type of view to display albums of pictures (in modals). I just think this can be confusing to users and makes for a poorer user experience.
What would happen if your image happened to be a black/grey dot? You can’t see it!