Where is the black coming from?

http://www.magickitchen.com/info/Frozen-Meals.html

Hi- When I refresh pages on my site, sometimes I see a black background before it loads. Can you see it too? If so, where might it be from? You may have to refresh a couple of times. I'm viewing it on Firefox 45.0.1. I don't see it on Chrome or IE. Thanks.

screenshot
Thanks.
Melody ScottAsked:
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Ali EslamifarUXCommented:
Hi,

Have you tried clearing your cache and cookies? I cannot reproduce this bug in my Firefox, but I know that Firefox sometimes creates random issues like this, you may need to clear cache, or even re-install your Firefox.

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Melody ScottAuthor Commented:
Hmm... I actually have web designer toolbar on, and I have disable entire cache on there, but you're right, when I clear the cache, it goes away. Thanks!
Ali EslamifarUXCommented:
No problem, glad that helped :)
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