One more angry ex-Xmarks user here who has switched to FF sync. Shame it's not cross-platform as others have said, but It Works!
Xmarks/Lastpass/LogMeIn: your "premium support" is disgraceful. But probably no-one from the company bothers to read a mere user support forum. They are too busy "...driving meaningful insight, deeper relationships and better outcomes for all" [plus several more paragraphs of corporate guff on their "about" page: https://www.logmeininc.com/about-us
I have also been using Bitwarden for a few weeks and it works well. Lastpass Premium renewal cancelled. Goodbye!