A bar 1/4 "wide grey which traverse the entire web page has began to appear.

The gray bar appears and disappears as I scroll to the bottom of the page. It is very annoying. What is the cause? It's on all pages web is not a web site problem, but a problem of Firefox.

So far, I saw him on NPR, Mother Jones, Facebook, Richmond.comand Huffington Post.

Thank you.

I rebooted my machine and the grey line disappeared.

Tags: Firefox

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