Hello, First, you are using an outdated and insecure version of Firefox. It is highly recommended that you update it: * Help (or [[Image: New Fx Menu]] > [[Image: Help-29]]) > About Firefox Or download a fresh copy here: * https://www.mozilla.org/en-US/firefox/new/ * (if you need a different localization): https://www.mozilla.org/en-US/firefox/all/ -------------- Once you update, don't these articles contain the information you need? * [[How do I set up Firefox Sync?]] * [[How to update to the new Firefox Sync]] * [[How do I add a device to Firefox Sync?]] * [[How do I choose what types of information to sync on Firefox?]] * [[Firefox Sync troubleshooting and tips]] What is it you are trying to do?