Originally Posted by oldyellr
Well, they're back, since yesterday, only a little different.
From your screenshot it appears (in your browser's toolbar) as if you've quite a few extensions installed. If this is the case, could you temporarily disable them and see if the problem disappears? Perhaps start with one that you only recently installed or updated, since you haven't had the problem before.
Alternative, what I always do first if I am seeing strange things on the browser screen is to refresh the browser's cache. In Firefox, you can do this with Ctrl + F5
or Ctrl + Shift + R