Peter's Blog

Firefox 1.5 is out and has broken the check checkloadurl option that I previously used to access local files. By default firefox will not let you open local files defined by the file:// protocol in the url.

This page proposes a fiddly solution involving editig user.js files but the following also appears to work:

• go to about:config
• find the term network.automatic-ntlm-auth.trusted-uris and edit it
• enter the address of your intranet site, e.g. http:://intranet.bigco.com (this threw me for a bit, I though you had to put the file:// link in here but it's the originating web site that you are trusting).

Credit to whoever mentioned this method in the comments to Firefox intranet problem.

UPDATE: this may only work if you log into the windows domain, otherwise you have to use the fiddly solution (editing files, no gui ).

To summarise the fiddly solution, edit/create a user.js file in your firefox profile directory and put this in it:

user_pref("capability.policy.policynames", "localfilelinks");
user_pref("capability.policy.localfilelinks.sites", "http://intranet.bigco.com");
user_pref("capability.policy.localfilelinks.checkloaduri.enabled", "allAccess");

where intranet.bigco.com is the url of your intranet.

If you don't know where your firefox profile directory is then look here.