I use multiple devices and it is indeed a pain not to have a server where all the browser metadata is stored. However, I do not like the idea of leaving all my data in a centralized vault managed by a third-party, even if it is Mozilla. How about spinning the server part of firefox account management (or part of it) into an independent open-source project, which people could install on their own machines, and provide a setting in firefox to make it point to a custom server instead of the central mozilla server ?
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