Avast blocked my internet connection, problem persists after uninstall

Hi, I used Avast to clean up my iMac, but then I noticed the internet connection wasn’t working on most apps, with the exception of Firefox, which works just fine for some reason. But when i try to connect with Chrome, Safari, or my Adobe Creative Cloud or the App Store it won’t connect. I’m on an iMac 4k 21.5 inches 2015, with Mojave 10.14.6. I uninstalled Avast but the problem persists, I also accessed my router setting to see if it was a Mac filter, but it’s not. Again it’s weird that Firefox does work. Any ideas?

Probably best to post this in the Avast Mac Security forum.