Or more likely what did my cats probably do while walking across my keyboard as they somehow hit shortcuts I have never seen before on a regular basis. On one computer in my house, I can now only see this site in its whatever 1970's white background, black text, blue links form. It is only this site, only on firefox, and only at this computer. All other sites appear as they are supposed to. This site appears fine on other computers and on the same computer when I use Chrome instead of Firefox. I am baffled by this by something must have changed in my settings somewhere or the other.
Any clue?