(1) start Hybris server via debug option

(2) import folder hybris\bin into Eclipse.

Right click on the extension you want to debug. In my example it is yacceleratorstorefront.Choose Debug Configuration from context menu. Use Remote Java Application for debug configuration and connect to port 8000.(3) Set breakpoint in file \bin\ext-template\yacceleratorstorefront\web\src\de\hybris\platform\yacceleratorstorefront\filters\cms\CMSSiteFilter.java.

And access the storefront url below and try to open a catalog:

Then breakpoint is triggeredAfter you press continue in debugger, you could observe the detail page with url inspected in debugger as expected.