I run Windows 7 64-bit. I have the Java JRE 32-bit installed. I use Firefox almost exclusively for web browsing. I see there is a 64-bit JRE, but I can't really tell what use it is. Under what ...

Go to this link: "https://adoptopenjdk.net/". OpenJDK 8 (LTS) and Hotspot should already be selected for you on the web page (if not select them). Click on the big ...