internal network file locations not opening when using Firefox

I manage my company's intranet websites. On these webpages are many urls that redirect users to other servers that house the documents for them to reference and download. The intranet website works flawlessly for internet explorer. When i click the URL in IE, it connects to the document in question and downloads. If i click on the link in mozilla, i get "the page cannot be found". Looking closer, if i hover the mouse over the URL, it displays the file path. In IE, it says file:\\servername\folder\document. in Mozilla it goes http://intranet_webpage/\\<servername>\<folder>\documentname.docx. Is this something that needs to be modified on an individual users pc, or something related to the web server?