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There is no Sync tab in my firefox>tools>option menu

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There is no Sync tab in my firefox>tools>option menu

There is no Sync tab in my firefox>tools>option menu

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Firefox Sync is built in to Firefox 4 and later. If you are using Firefox 3.6, it is available as an add-on:

https://addons.mozilla.org/firefox/addon/firefox-sync/