Fair enough. I just checked the AdGuard support forums. They agree that this feature can't work with the Content Blocker approach on macos. There's no way they can get any hooks into the browser, so interstitial ads will remain just that: interstitial.
I can see that AdGuard is probably a decent product for most other current browsers, though. Thanks for suggesting it anyway.
I can see that AdGuard is probably a decent product for most other current browsers, though. Thanks for suggesting it anyway.