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How do you restore tabs from another computer using Sync?

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I got a new computer, so in order to migrate all my open tabs and bookmarks I installed Sync. When I opened Firefox on the new computer and signed into Sync, I found all my bookmarks were indeed migrated but none of my open tabs were. I no longer have access to the old computer, so hopefully there is a file online somewhere that contains all the information with my open tabs - I had dozens and don't want to lose them! When I click "Library" and "Synced Tabs", I see nothing but a broken heart icon and a button to "Connect Another Device" (which takes me to a screen to connect my mobile device - not helpful). When I click "Manage Devices" under the Sync Tab menu, I can see the device listed but the only option is to Disconnect. How can I view the js file associated with that other device?

I got a new computer, so in order to migrate all my open tabs and bookmarks I installed Sync. When I opened Firefox on the new computer and signed into Sync, I found all my bookmarks were indeed migrated but none of my open tabs were. I no longer have access to the old computer, so hopefully there is a file online somewhere that contains all the information with my open tabs - I had dozens and don't want to lose them! When I click "Library" and "Synced Tabs", I see nothing but a broken heart icon and a button to "Connect Another Device" (which takes me to a screen to connect my mobile device - not helpful). When I click "Manage Devices" under the Sync Tab menu, I can see the device listed but the only option is to Disconnect. How can I view the js file associated with that other device?

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Sorry, no file on line. By the sounds of your question : that you are using Firefox Sync as a back up service. This is not what Sync is designed to do. The Firefox Sync service takes a copy of the data you wish to include and transfers it to a second device (typically a mobile device such as a tablet or a telephone) running a copy of Firefox. The storage in between all attached devices is both temporary and fragile and is not stable enough to be (and is not designed as) a reliable backup service.

If you have a copy of your Firefox profile for desktop Firefox, you may be able to recover your bookmarks and other data. Please have a read of these article.

If you have a copy of your data on a mobile version of Firefox, please follow these instructions to connect it to Firefox Sync to copy your data.