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After Upadate to Firefox 18.0.1 Sync and Pair Device options stop to work

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After I input the code on second device in "Pair a Device" dialog and click "Next" button I always return to "Firefox Sync Setup" dialog (without any error message) and devices stay not paired.

After I input the code on second device in "Pair a Device" dialog and click "Next" button I always return to "Firefox Sync Setup" dialog (without any error message) and devices stay not paired.

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Thanks for quick response. I already read this troubleshooting guide. And it not solves the problem.

The Sync works fine with Firefox 17.x but once I installing 18.0.1 version it stop to Sync devices.