I liked this extension, I was missing something like ImgLikeOpera for Quantum, this is quite similar.

There are some minor problems in the options page with the drop-down list for mode selection when the page is not at the beginning.

By the way, the localization is still reduced, so I would like to contribute with strings for Spanish, which I have already translated for my own use. Also, "None", "ALT String" and "[block]" should be localized as well.