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 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:
Browser agent types
We have three types of browser agents: Lite, Pro, and Pro+SPA.
Browser agent type  | Comparison  | 
|---|---|
Pro+SPA  | 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.  | 
Pro  | This agent version lacks the features designed for SPA monitoring.  | 
Lite  | 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.  | 
Browser agent features
Our features included with the browser agent depend on the browser agent type.
Feature  | Lite  | Pro  | Pro+SPA  | 
|---|---|---|---|
Page View  | TRUE  | TRUE  | TRUE  | 
Page View Timing (inc. CWV)  | TRUE  | TRUE  | TRUE  | 
Ajax Requests  | FALSE  | TRUE  | TRUE  | 
JavaScript Errors  | FALSE  | TRUE  | TRUE  | 
Logs  | FALSE  | TRUE  | TRUE  | 
Metrics (Errors and Ajax Requests)  | FALSE  | TRUE  | TRUE  | 
Generic Events 
  | FALSE  | TRUE  | TRUE  | 
Session Trace  | FALSE  | TRUE  | TRUE  | 
SPA  | FALSE  | FALSE  | TRUE  |