Can I use TouchID for a password in my browser? I would like to use my touch ID to fill in my password at any website. Is there a plug-in for that or is it still inpossible.

Example: Facebook asks me for a log-in on facebook.com and I want that when I lay down my finger on the touch id that it automatically fills in my password.

Do I need to dream on or is there a possibility to reach this?

Thanks in forward.
You can save your usernames/passwords in Safari and have them be filled in automatically when accessing the site. On Mojave, this filling-in can be controlled with Touch ID via the Touch ID System Settings.