ablancodev

Create a conversion funnel in your wordpress. 
It allows for seamless tracking and categorization of users based on their conversion states, providing valuable insights to optimize marketing strategies and enhance overall user engagement.
You can create leads manually or automatically when register new users.
Users can travel through the conversion funnel by visiting different pages.
Referrer system ready with url param.
If you need to notify them, you can use WordPress emails.

Funnel

Streamline Your Marketing: Effortlessly Navigate User Conversion Paths

Adam Bissonnette

This is a simple plugin to disable the back button: [dbb /].
This is optimally used for surveys or funnels that you do not want people backing out of. It prevents the back button from being used by employing a small script that quickly replaces the location context of the page and beffudles the browser.
Redux Option panel included allows you to enable this functionality sitewide as well as disable it for logged in users.

Disable Back Button

Plugin to disable a browsers back button.

Funnel vs Disable Back Button