In most of the use cases discussed in this proposal, the preferences that are shared are used to customize a user's experience on the websites they visit. However, it is also possible that a browser manufacturer might modify the browser codebase to also lookup a user's browser preferences from their PDS, such as their default search provider. For example:
- Tom uses yahoo.com as his PDS, and has configured his default search provider to be yahoo.com
- Tom buys a new laptop, and logs into yahoo.com.
- Yahoo detects that his CDS setting is empty, so it prompts him to set yahoo.com as his PDS through the CDS domain
- The browser on Tom's computer detects that the CDS cookie has changed, and automatically looks up his PDS preferences, and looks for any browser preferences
- It finds that Tom uses yahoo.com as his default search provider, so the browser automatically changes its built-in search box to use yahoo.com