On 12:57 27 Aug 2020, Harry Bloomfield, Esq. said:

The past 3 maybe 4 days, loading the Ebay website, it has usually
appeared as just text on a plain white background, no graphics. No
other sites seem to be affected, anyone else? I'm using latest Firefox.

Have you made a change in Firefox to the default fonts or colours?

That can use a different viewing profile (CSS) which overrides more settings
than the ones you changed.