There shouldn't be two processes unless you have another window opened or a plug-in that is running in the background, but even so, you should see them. If you believe they're something else, then I recommend running an application that can check the browser and its processes as well as scan the Windows folder and the running services for known malware infections.
The software's name is AdwCleaner and it's available for downloading through the following link: https://toolslib.net/downloads/viewdownload/1-adwcleaner/