No boundaries for user identities: Web trackers exploit browser login managers for more info go here. https://www.howtogeek.com/338209/you-should-turn-off-autofill-in-your-password-manager/ and here https://www.ghacks.net/2017/12/31/how-web-trackers-exploit-password-managers/
Thanks for posting this info, ALF60. May 2018 be your best year yet!