You do not need to install FireFox, just download the FireFox add-on from Foxit and install it in Foxit.
Find and copy the 2 files to the Plugins subdirectory as described above:
FROM: C:\Programmer\Foxit Software\Foxit Reader\plugins
TO: C:\Users\UserName\AppData\Local\Google\Chrome\Application\Plugins (Create it if need be).
In the dos prompt (CMD) as administrator:
Type: about:plugins in the address field of Google to use Chromes plugin manager to verify the installation and remember to deactivate Chrome PDF Viewer from the plugin manager, then it works.