This feature would not be a good extension if you load more files than a couple of dozens.
Even for collections of some 10,000 files it would take a lot of time to find the best column width, not to mention collections with 6-digit-number of files.
I don't know: have you ever tried to even open Windows Explorer with a folder that shows 10,000 files? You'll regret it. Takes literally hours.
That is jus my fear.