The browser agent type has no impact on your billing. It's simply a way to switch to a more minimal set of features, if desired. The default browser agent installed comes with all browser monitoring features enabled.
To change your browser edition type, go to one.newrelic.com > All capabilities > Browser > (select an app) > Settings > Application settings.
Here are some comparisons between the different browser agent types:
We have three types of browser agents: Lite, Pro, and Pro+SPA.
Browser agent type
This is the default installed agent when you enable browser monitoring. It gives you access to all browser monitoring features.
Pro+SPA is not useful only for single page applications. After install, you can downgrade to the lower agent types if you don't want or need SPA monitoring.
This agent version lacks the features designed for SPA monitoring.
This agent version reports some basic page load timing and browser user information, but lacks many of the more advanced browser monitoring features, and also lacks SPA monitoring features.