OS: Linux Mint 22.1 Xia base: Ubuntu 24.04 noble Firefox: mint-001 -. 1.0 / 137.0.2 (64-bit) When starting Firefox with a '''completely new generated profile''', I still get following errors in the Browser console tool: For example (see attachment): services.settings: UnknownError: IndexedDB: main/moz-essential-domain-fallbacks getLastModified() IndexedDB: The operation failed for reasons unrelated to the database itself and not covered by any other error code. Module: RemoteSettingsClient.sys.mjs:555 At this time using Firefox, I haven't configured a Firefox sync-account, to sync settings with the central stored profile on Firefox servers. Solution: May it is helpful, that if a sync-account '''isn't''' configured by a user, these function calls should be suppressed by Firefox, in order to avoid these exception/error messages in Browser console. These error message are just irritating messages, as long as a sync-account isn't configured and activly used.