Offline game or fun google chrome extensions?

im planing on going to mexico on a plane but my laptop wifi doesnt work so i want to download a free fun extension to play on the plane while i wait to land please help|||umm i recommend armagetron advanced its a small download and its an multiplayer and offline game if you ever heard of tron cycles/light cycles this is that it is its a 3d game 763 bytes i think and its like a 3 or 2 minute download depending on your download speed its very fin you can play against (AI bots, artificial intelligence ) and when u get online you can play against people and chat an such but thats about it gL.