KeePassXC password manager program and KeePassXC-Browser add-on for Firefox accomplish what was intended with this add-on.
https://addons.mozilla.org/en-US/firefox/addon/keepassxc-browser/
Mozilla Firefox add-on lets you customize the titlebar text according to a rule. This changes the active window title and is useful for auto-type programs such as KeePass for entering correct account credentials.
Firefox add-ons listing: https://addons.mozilla.org/firefox/addon/custom-titlebar-text/
Licensed under GNU GPL v3 (http://www.gnu.org/licenses/gpl-3.0.html).
This add-on is written to replace the following two legacy addons: