Yeah.....it's all new this year, and TTX has a lot of work to do to fix all that. I'm not sure it actually uses a password manager, but it does appear to leave you logged in to Fidelity.
After importing my Fidelity stuff, and when I opened Edge again, and went to Fidelity...I found I was already logged in. But once I actually logged out from that page, it went back to the normal login procedure for Fidelity.
TTX has been having a lot of issues downloading files for folks having multiple accounts at the same brokerage...I'm wondering if this not-logged-off situation is part of it. TTX needs to initiate a logoff after importing any financial provider's "stuff".
____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*