Awasue trusted app but blocked?

I use Awasu as my RSS reader and when I want to open an article I am reading in it in Firefox, I would normally right click and choose “open in default browser.” But that is no longer working. I have researched possible Windows config issues that could cause it and run a command to ensure it is configured as my default browser. Anything I click in other apps opens in Firefox but not Awasu links and the developer has asked about my firewall. I added it as a trusted app but it still isn’t behaving as expected.