Simple no-CPU-impact, full-page snowflakes, gently falling and swaying in the soft wind.
Lots of configuration options including multiple colors.
All users can toggle snowflakes on or off via option at bottom of all pages. Simple cookie set and read. If the toggle does not seem to work just refresh the page; probably a cookie set/unset/not-there quirk.
Obvs if you have the 4x version just dump it.
Not mine, I'm just packaging it up for INVCOM 5x. MIT licensed: https://github.com/hcodes/snowflakes