Roger Price wrote Mon, 29 Jan 2018 23:13:05 +0100 (CET):
I rebooted stretch and now my journald is being swamped with the following message:
/usr/lib/gdm3/gdm-x-session[2684]: Promise rejected after context unloaded: Message manager disconnected
It's the Ghostery addon to Firefox 52.6.0. I removed the addon and submitted ticket 6081 to Ghostery.
Roger