Hi Ererer, Thank you for your question. Please try the following troubleshooting, but make a back up of your profile first: Back up and restore information in Firefox profiles

1. Remove the account from the updated device
2. Go to accounts.firefox.com
3. Login one more time

Then go to your account settings on the android device and make sure that sync is not disabled for the account. Also make sure that auto-data sync is allowed.

Please also make sure that you are not in a guest session by tapping on the menu and tapping "Exit Guest Session"

How exactly do I make a backup file of my bookmarks on android? Because for the link you gave, it was for windows. And if I delete my Firefox account from android settings, will it delete all of my passwords on my device, not the account? So I can re-setup the Firefox sync? Thanks

• will it delete all of my bookmarks on my devce, and current Firefox settings and bookmarks and stuff like that* is what I meant

Detaching the account should not erase any information stored on the local android profile. However making a back up in mobile is also currently not a built in feature. In the past the profile has been located in the folder that is mentioned in this solution: https://support.mozilla.org/en-US/que.../950536

Thanks!