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I am not doing anything to cause this as far as I can tell, but sometimes it does this a few times in a row. This happens when it has been working for some time. I checked the other notice of this problem, but mine is XP and it is not happen on a re-start.

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up vote 0 down vote accepted

You can try to right-click in the about:config page to open the right-click context menu and use "New > Boolean" to create a new Boolean.

Name: network.manage-offline-status
Value: false

You can also look at these two add-ons:
Disable Automatic Offline Management

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The add-on “Disable Automatic Offline Management” has been removed. – Nicolas Barbulesco Sep 22 '13 at 20:14

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