Couldn't Connect To Bookmarks After Running Spyhunter5

Often, when I'm shopping and do a Google search, when I click on something that I want to buy, say at JC Penney, I get redirected to http://d.agkn.com, not all the time though. I have MBAM installed, ran a scan, and nothing showed up. I then downloaded and ran AdwCleaner and it removed 3 PUPs but was still getting redirected to dagkn.com k. I then downloaded and ran SpyHunter5 and it found the files in the attached picture. I deleted the files and rebooted but when I got back on line, none of my bookmarks would open. When I typed Google.com in the address bar, my browser wouldn't go there either. I wound up doing a System Restore to a few days ago and my browser works again but I have the malware again.

This problem only happens when I use Firefox, my default browser. It doesn't happen when I'm using MS Edge.

I want to get rid of the malware but I don't know what program to use that won't cause other problems with Firefox. What's program would be recommended?