Window.open opens new Firefox page, not a windows exploer window

Question

I have a javascript code within Dynamics CRM to open a windows explorer window if a field is double clicked with the folder location in that field. For example, if our local server name was COMPANYSERVER
If the field contained \\COMPANYSERVER\Accounts and you double click it, that windows explorer window shows the Accounts folder in the COMPANYSERVER, and I can navigate to any child directories.
If we use CRM in Internet Explorer, this works fine. However if CRM has been opened in Firefox, instead of opening a windows explorer field, it opens a new tab in Firefox, with a File or directory not found error, obviously because it is trying to find a webpage rather than an internal directory.
I was not sure whether to log this on a Dynamics forum or Firefox forum, so I have done both, but as I say, it works perfectly with IE so I guess it's something I need to do differently for firefox, or change a setting somewhere within firefox?
I am very new to firefox, so if you can be quite basic with your answers I would really appreciate it!

Answer 1

I personally have not done this before, however there are two old sources that have both referenced the IE Tab extension.
http://www.powerobjects.com/blog/2008/06/02/dynamics-crm-in-firefox-you-betcha/
*Is Firefox the default browser?
*Does it automatically run Firefox as the Administrator that is logged in?