White Bar at top of Firefox 44

I have a white bar at the top of FF 44. It has the fox in upper left corner and then the page I am currently on is noted :" Latest Themes topics_Mozilla Discourse-Mozilla Firefox" is what is up there while I am on this page. How do I get ride of it? I have been searching for 2 hours trying to find out. I am using Windows 10. I removed the white bar once but it is back. So can anyone tell me what the name of the bar is and how do I get rid of it so the theme shows and not the white bar?

I am having the same problem and have found nothing. It is very distracting as my desktop background is dark and the contrast is hard on the eyes. If anyone knows how to get rid of this please let me know. I already did a refresh.

I found a posting somewhere else by you that suggested Hide Caption Titlebar Plus. This works. Thank you.

MM

If you download the AddOn, Hide Caption Titlebar Plus you can get ride of
that ugly white bar and even several other settings. Good luck!

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