To make PWM not enter a password into the “Allow website” form from FoxFilter, you

  • Add a new account to PWM.
  • It needs to use chrome://foxfilter* to calculate generated password
  • Automatically populate should be unchecked
  • I also have a (perhaps unnecessary) autopopulation pattern chrome://foxfilter*,
  • Under Advanced Autopopulate you need field TextPassword, type text, value blank

I hope I never have to figure that out again. Probably better to just use LeechBlock for what I was trying to do anyway.