Comic page image format option in online reader

I'm happy webp support was added! The only issue I've found is slow page loading when reading online. I suspect this is the webp->jpg conversion happening in the background as new pages are requested.

Would it be possible to add an option to allow the user's session to select between native image format (ie send webp unconverted) and converted (ie convert webp to jpg, as it is now)? This should speed up non-jpg page loads dramatically for browsers that support the native image formats.

I realize not all browsers support the webp image format so maybe hiding the option somehow (manually add to preferences.xml?) would prevent the uninformed from mistakenly enabling it.