Firefox access to network drives

Hi all.

I'm struggling with an issue that I'm unable to find a solution for.

In a web app for an intranet, I allow users to store files on a network drive, those files can be accessed through a direct link to the file on it's stored location.

The problem is that, although IE allows the links to be accessed adding the site to trusted sites, Firefox avoid the activation of such links.

I've googled for a while looking for a solution, as I think that this is a common issue on controlled environments where it should be configurable somehow.

However, all the info I've found so far didn't work on my site, links to files sill are unactive on Firefox.

I've tried to change those policies on Firefox:
network.automatic-ntlm-auth.trusted-uris; --> added websiteServerAddress
network.negotiate-auth.trusted-uris; --> added websiteServerAddress
security.fileuri.strict_origin_policy; --> false

I've created those policies:
user_pref("capability.policy.policynames", "localfilelinks");
user_pref("capability.policy.localfilelinks.sites", "websiteServerAddress");
user_pref("capability.policy.localfilelinks.checkloaduri.enabled", "allAccess");

I've also tried to build the links this way: "file://///sharedDrive/restOfPath"
As file:///// is suposed to stablish localhost as a bridge for file accessing and allow the access. In fact, when I copy the link with the five slashes from the webpage to a new tab's url bar the file opens, but if I try to click the link it remains dead.

I supose I must be missing something here, but I'm sure I'm not the first one with this problem and there must be a solution for it.

Any suggestions welcome (however, save yourself those based on: "Implement WebDav", as I'm already aware of it and considering the posibility, but need something to fix things in the meanwhile).

Also solutions/fixes for Chrome will be welcomed.
Thank you.