You can read about Firefox Sync here: https://hacks.mozilla.org/2018/11/firefox-sync-privacy/ https://hacks.mozilla.org/2018/11/firefox-sync-privacy/. It is als

You can read about Firefox Sync here: https://hacks.mozilla.org/2018/11/firefox-sync-privacy/ https://hacks.mozilla.org/2018/11/firefox-sync-privacy/. It is also possible for you to run your own sync and account servers: https://mozilla-services.readthedocs.io/en/latest/ https://mozilla-services.readthedocs.io/en/latest/. I assume that Chrome has a similar design, but I'm not familiar with it.