Saved Logins not available in 10.5

We're received a few complaints that after upgrading to 10.5 the saved passwords are not available.

Steps to reproduce:

Install Tor Browser
open about:config
Flip browser.privatebrowsing.autostart
Flip security.nocertdb
Optionally flip signon.debug, devtools.console.stdout.chrome, devtools.console.stdout.content for debug logging
Quit Tor Browser
Start Tor Browser (again) with verbose logging on stdout
Open about:logins (or Logins and Passwords under the Hamburger menu)
Click Create New Login on the lower-left
Input text into the fields
Click Save
See failure messages

Edited Jul 07, 2021 by Matthew Finkel

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information