http://community.wd.com/t5/WD-My-Cloud/Cannot-access-WD2Go-on-firefox/m-p/892687
http://community.wd.com/t5/WD-My-Cloud/Certificate-Trouble/m-p/885148
Also see p19 of the English user manual. Interestingly, this discussion isn’t present in the German user manual… There’s a whole section about ‘Installing and Accessing the WD My Cloud™ for Desktop App’ that is simply not present, and it jumps straight to ‘Getting Started Without the Online Setup Installer’ (‘Erste Schritte ohne das Online-Einrichtungsprogramm’).
The Spanish manual appears to be identical in content to the English…