I installed Thunderbird version 115.16.0 I created an [https://github.com/thunderbird/policy-templates/tree/master/templates/esr115 enterprise policy file] with the following policies: * DisablePasswordReveal: true With this policy in place, I expect Thunderbird to disable the option to Show Passwords when going to Settings > Privacy and Security > Saved Passwords. However as seen in the screenshot I am able to click on the Show Passwords button; and the passwords are shown along with addtional blank entries that only appear when the Show Passwords button is clicked. The only work-around that I could find to this issue is to also set the following policy: * PasswordManagerEnabled: false