Using Windows 10 + FF 103.0. Never had login issue with Vanguard site until yesterday. I bookmarked this page: https://investor.vanguard.com/my-account/log-on When I click the login button, it re-directs to: https://logon.vanguard.com/logon, and get stuck Trouble-shooting mode, clean cache, clean cookie, change setting, etc, etc, won't fix the problem. This is the fix: change the bookmark to: https://personal1.vanguard.com/zaa-balances/ You'll see the same login page, but this time, it goes forward. I believe this is a Vanguard website rather than Firefox issue.