1Password 8 does not detect which app is open

Hey there @dweidenfeld

1Password 8 doesn't need you to do the whole "reverse URL" notation any more; when you open Quick Access and then Autofill an item into an app, you'll get a prompt to link that item to the app. Here's how to do that:

1. Launch your "target" app to be autofilled.
2. Open 1Password's Quick Access – the default keyboard shortcut is ⇧⌘Space (Shift–Command–Space).
3. Find the item you need and press ⇧↩ (Shift–Enter) to Autofill it.
4. You'll see a prompt asking if you want to "Fill Once" or "Fill & Update Login".
5. "Fill Once" won't link that item to the target app
6. "Fill & Update Login" will add the target app to the Linked Apps section of that item

Give that a try, and take a look at this article from the 1Password Support website which might help:

☞ Use Universal Autofill in apps and browsers on your Mac

I'll be here if you need anything or have any questions. :)

— Grey