No Live Bookmark link using masked redirect…

So my blog is actually located at https://www.flipflopstretreat.com/wordpress however I use the domain https://www.drivelblog.com as a redirect to that address. It is masked so that, of course, the url in the address bar doesn’t change.

I think I finally have everything working with just one minor problem: in Firefox when you go to drivelblog.com the Add Live Bookmark logo does not appear in the bottom right of the browser. However if you go to the actual address (flipflopsretreat.com/wordpress) the logo/button is there and the feed works fine.

I was wondering if there was any way to get this fixed without unmasking the domain.

Any help is much appreciated.