Since closing and restarting my PC today I have discovered a weird thing when I opened up Firefox. I have a blank chunk across the bottom with a little ^ in it. This is making my web pages shorter than usual. Anybody know how it has occurred and how I can get rid of it? I have tried closing off Firefox and re-opening it but that makes no difference. It's still there. See image
Ignore the purple. That's just part of my own customisation which I have had for ages.
Ignore the purple. That's just part of my own customisation which I have had for ages.


