Briefcase Documents Favicon

[linkagge]

Where would I go to replace the favicon that shows up when you open a new document in the briefcase in a new tab?

I've replaced the favicon is the usual places and it's working everywhere else but here.

Any help would be greatly appreciated, I've already searched all over the place and can't seem to find it.

Thanks!

[linkagge]

Does anyone have any ideas where to look for this hidden favicon.ico file ?