I used comodo FW/D+ until very recently (when I got AIS).
There are very few D+ pop-ups with the latest version on comodo’s default settings and a system that only runs ‘standard’ stuff. Same for FW events.
If you want to check that it’s working you can trigger a D+ event by doing an mbam scan, or a pop-up with the avast autosandbox test tool (select don’t run in sandbox).