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Xfinity Toolbar will not show even when enabled and checked?

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The Xfinity Toolbar shows as if it should be seen in the "View Toolbars" area, and the space is there, but nothing shows in the space. I can't pinpoint when this started, but in previous versions of Firefox I'm sure I had use of this toolbar.

The Xfinity Toolbar shows as if it should be seen in the "View Toolbars" area, and the space is there, but nothing shows in the space. I can't pinpoint when this started, but in previous versions of Firefox I'm sure I had use of this toolbar.

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orange Firefox button > Add-ons > Extensions = is that extension enabled?

Beyond that it might be best to contact Comcast support.
http://forums.comcast.com/