Well, mstywoods, I never use Firefox. But because I was curious, I updated mine to 62.0.2 and sure enough I see what you see. As soon as I click on a link, it flashes the page, then nothing but a blank page. If I figure out why, I'll let you know.

I think I figured it out. It did that until I logged in with my username.

I'm on Firefox 56, and it gives me a "Something went wrong" error modal every time I load a page -- but everything works, so it's a small price to pay.

(Not updating Firefox until there's a solution for my tab groups!)

Thanks popmama! I could have sworn I was logged in with FF, but earlier I had to log in while using Chrome to read and post. Just now I clicked on the email notification of your post and it opened Firefox - now I can read the posts in FF. So indeed it must have been I was not logged in earlier! It shouldn't behave that way, but now that I now the "secret" I'll be able to use my usual browser.