Flash Player installer is a universal installer that installs both 32- and 64-bit versions of Flash Player on a 64-bit OS. There isn't a separate 64-bit only installer.
That is 100% retarded. Why do I have to install a version of flash that the only time I'm going to use is if one of my browsers chooses the wrong one?
Most browsers are 32-bit browsers, even on 64-bit operating systems. Which browser are you using on Windows 10?
Waterfox. It's a 64 bit distribution of firefox.