The Ghostery button disappers every time from the Thunderbird 31 navigation bar after boot.

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This tip I followed:

If so, open Ghostery's Options, and click the Advanced tab. Make sure Show Ghostery button in Navigation Bar is checked. If not, check it and click the Save button at the bottom of the page.

Make sure Show Ghostery button in Navigation Bar is checked. If I leave this page and retund the button isn't checked anymore.