A lot of images on the web come with an ‘alt’ attribute, that specifies an alternate text in case the image cannot be displayed; this attribute gets lost upon pasting into Anki.
I think it would be quite useful if it was kept instead.
e.g.
- it would be helpful when media synchronization upon multiple devices is yet to be completed or encountered some errors
- it often contains infos about the image source
- it would add some keywords to the image, which could then be used when searching the browser
Also, the ‘alt’ attribute usually comprises just a few words, so, as far as I understand, it should not ‘weigh’ much on disk space, memory etc.