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I accidentally downloaded FIrefox Quantum, how do I figure out which firefox installation to uninstall?

Dr. nurse mom

I inadvertently installed Firefox Quantum, but am a private user. Somehow, this is the Firefox that auto opens when I try to open firefox, however if I open an app that needs to go directly to the web, my normal Firefox is what opens. I see several 'firefox.exe" files on my PC. How do I figure out which one to uninstall? Please forgive me for being a techno-peasant.I am running windows 10.

I inadvertently installed Firefox Quantum, but am a private user. Somehow, this is the Firefox that auto opens when I try to open firefox, however if I open an app that needs to go directly to the web, my normal Firefox is what opens. I see several 'firefox.exe" files on my PC. How do I figure out which one to uninstall? Please forgive me for being a techno-peasant.I am running windows 10.
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Chosen Solution

Enter about:support in the URL bar. There will be path to your currently used instance.