WebP support

[radagasus]

I didn't immediately find something about this online, but it looks like WebP images aren't supported. You can try with this HTML :

<img src="data:image/webp;base64,UklGRoQAAABXRUJQVlA4WAoAAAAQAAAABAAABAAAQUxQSA0AAAABDzD/ERHiDh8R/Q8HAFZQOCBQAAAAcAIAnQEqBQAFAAIANCWwAnS6AMr/3EDeQAhMAAD+8MQL+e7fhylB4TGPeftaby9/E/+6Cent9x9O1WcNYH/4od/8D5uL//4sP/AiayAAAAA=" />

It is supposed to show a red dot. The PNG version of this snippet works fine. Neither work in the sandbox because the sandbox filters out URLs including data urls.

Aside from preprocessing input HTML to convert WebP images to some other format, is there anything that can be done about it?