figcaption breaks alignment in firefox

I’m having an issue with captioned image alignment in Firefox (latest Mac) but no other browsers. In the referenced page, my alignright images with captions look correct on other browsers, with captions under images and text flowing around them to the left. But on FF, images are aligned left, captions are aligned center, and text does not flow around them.

I traced the problem to figcaption: when an image is inserted without a caption, FF behaves correctly. I’ve seen some bug references to figcaption, but not exactly like this, and many are dated.

Advice? I’m running everything latest, on a Genesis theme with fairly simple figcaption and alignright CSS.

Jim P.

The page I need help with: [log in to see the link]