Ok, I figured out what the problem was with Firefox. I had to allow popups, which I normally have blocked for all sites.
I also figured out the problem with the bags not drawing properly. I was off on my Y dimension by 1 or 2. I have attached the corrected version of the mod which now draws all size bags and boxes properly as far as I can tell - just in case someone else out there is like me and would like to have it.
I
do have one other question. I noticed that this has no effect on the bags in the the House Vault. What UI file do I have to modify to make
them stay put?
I haven't seen any mods on the site for the House Vault at all.