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My Firefox sync stopped working after the latest update. Bookmarks are not syncing between my desktop and laptop. I have tried signing out and back in but it still does not work. Any suggestions?

After updating Firefox to the latest version, my bookmarks are no longer syncing across devices. I have Firefox installed on Windows 11 and Linux, and the sync was working fine before the update. I have tried signing out and back in to my Mozilla account but the issue persists. Any help would be appreciated.

When I frequently turn off my computer using the system unit's power button, meaning a quick shutdown, after several such shutdowns, when I launch the browser, I'm prompted to log in again. Bookmarks that weren't synced disappear. And I'm also logged out of all the websites I was logged into, forcing me to log in again. Cachyos Linux.