Hi fhrussell06, welcome to the furum 
First of all : Avast doesn’t highjack Firefox, as SafefZone uses its own customised version of Cromium, the same browser Google Chrome is based on.
That said, I see from what you tell us that you are infected with malware, and that should be removed first.
Please follow this turtorial https://forum.avast.com/index.php?topic=53253.0
Than start a new topc here https://forum.avast.com/index.php?board=4.0 and attach the requested logs.
Also give a description of your problems as you did here in your first post.
As soon as an expert is online and available he/she will help you.
Greetz, Red.