If you have a Master password, sync my not sync passwords properly. Why can't I sync my passwords?

However have you set the permissions in Firefox to allow storage of passwords? https://support.mozilla.org/en-US/kb/permissions-manager-give-ability-sto...

Oh, you forgot logins.json file https://support.mozilla.org/en-US/kb/recovering-important-data-from-an-ol... Try adding that and restarting Firefox.

Is there a signons.sqlite file in that profile?

Firefox 32 and later builds store the passwords in the logins.json file in the profile folder and no longer use the signons.sqlite file. If you still have the signons.sqlite file that was used in Firefox 31 and older then you could try to recover the passwords saved in that file (you will lose passwords saved in Firefox 32). You can force Firefox to reimport the passwords from the signons.sqlite file and rebuild the logins.json file.

• reset the signon.importedFromSqlite pref on the about:config page to the default value via the right-click context menu
• delete the logins.json file in the Firefox profile folder with Firefox closed

When you restart Firefox then you should have the signon.importedFromSqlite pref with the value set to true and you should have the passwords imported in the Password Manager unless there may have been errors.