Furious Road is a vehicular combat game: you drive a weaponised vehicle along a highway full of enemies who want to stop you, and you shoot, ram and outrun them. Upgrades between runs improve the vehicle's armour, weapons and speed.
It's the road-warrior genre in a browser tab, and the appeal is the escalation — a run that ends in thirty seconds early on becomes routine after a few upgrades.
Keep moving laterally so you're hard to hit, ram enemies from the side rather than head-on, and upgrade armour before firepower — survival time is what lets you use the weapons at all.
Yes — between runs you improve the vehicle's armour, weapons and speed, which is the progression.
Yes — it runs in the browser with nothing to install.