Did you have an ad blocker or other privacy add-ons installed? Many "website doesn't work in Firefox" issues are related to ad blockers. OTOH, if the page is b

Did you have an ad blocker or other privacy add-ons installed? Many "website doesn't work in Firefox" issues are related to ad blockers. OTOH, if the page is black and not repainting, that might be a graphics issue (in Firefox or the GPU driver). Firefox uses the GPU more than Chrome for rendering and video decoding, which can be great for performance but unfortunately means users can be exposed to GPU driver bugs.