Firefox has a weird quirk01, where this won’t lazy load the image:
1<img src="..." loading="lazy"/>But this will:
1<img loading="lazy" src="..."/>The loading attribute must come before the source attribute. This bug is specific to firefox and the loading attribute works as expected on chromium-based browsers.
I encountered this bug today, and it was nice to have a reminder that there is still some diversity in browser rendering engines.