We have customized the site admin search rail in AEM 6.4 with the custom fields like (Page Path,Page owner,page owners email, title etc). Currently our requirement is to add custom fields within the Path Browser filter section. Can any one suggest me on how to achieve this.
Here is a general doc that provides general customizations guidelines. As well - you can find some code examples that can point you in the correct direction - Customizing the Consoles