Firefox is just showing a place holder for the signature.
Edge the new Chrome version isn't showing anything at all where the image for the signature should be.
Neither however will allow you to go direct to raptr.com and are producing the same warning.
Assumption is that Firefox and Edge are blocking the image from the site as the image doesn't actually exist as the site was shut down, only thing there should have been the closure message, still registered until April 2020 though so probably been hacked.