You will need to install a user script manager extension to install this script.
How to use: You should see a menu bar on the right side of the screen, hover over it and the menu will slide out! If not you may have to push [R] this will toggle the menu! When out click on the buttons shown! This should upgrade your tank automatically! If you don't know what the upgrades do, press [T] twice/once.
(3= Health Regen) (2=Max Health) (0=Body Damage) (7=Bullet Speed) (7=Bullet Penetration) (7=Bullet Damage) (0=Reload) (7=Movement Speed)