Just confirming that it seems as though the glitch that crashes the game after the second season ending still exists. I've tried under three different browsers(chrome/firefox/opera gx), with custom and non-custom country lists, and with a different country as mine every time(Australia/San Marino/Scotland) and all three browsers/saves crash at the beginning of the third season.
The crash consistently occurs after the fade to black when clicking on the "Start New Season" button at the end of the second year. Every time it crashes I receive an error from WebGL about an index being out of bounds, and the wasm-function being mentioned over and over again.
Hope this info helps!