I currently have an architecture where I need to forward messages from the Safari Web Extension to another app through the App Extension. I understand from the docs on Apple, App Extensions are not meant to be used as a long running background task, but if it is just proxying messages, is it advisable to keep pinging the app extension to keep it alive and use it as a long running task in the background for proxying messages ?

I am trying to run a Main.xib file when an App extension starts from the Web Extension, but I am unable to see any output. I added the Main.xib to the App Extension's info.plist I assume when Safari runs and the app extension is called then the UI should pop up but I see no output.