I just copied verbatim from [upstream](http://magpcss.org/ceforum/apidocs3/projects/(default)/CefBrowserHost.html#Print()). 

To me it looks like it could be a difference between british (Longman) and US (Oxford) english http://english.stackexchange.com/questions/13556/content-or-contents (I do think the contents of a browser are countable though :)
Leaving it in until you succeed with a patch upstream - or you can just fix it here due to pure benevolence :smile: 
Self merging now!