In the Shi'ite villages around the capital Manama, demonstrators hurled petrol bombs during nightly clashes with the police who responded with teargas and rubber bullets.
Black smoke from burning tyres wafted over Budaiya, a village that saw mass protests this week.
Red Bull's world champion Sebastian Vettel said shortly after arrival on Thursday that he thought much of what was being reported was hype. He added that he was looking forward to getting in the car and dealing with the "stuff that really matters - tyre temperatures, cars".
The sporting event is the Government's chance to show that life has gone back to normal in the island kingdom after security concerns over anti-government demonstrations forced last year's race to be delayed, then cancelled.
It appears to have backfired, with nightly TV images of streets ablaze embarrassing Formula One and the global brands that lavish it with sponsorship.
The death of 36-year-old protester Salah Abbas Habib - found sprawled on a rooftop on Saturday after clashes - provides more fuel for outrage among a Shi'ite Muslim majority that complains of being marginalised by ruling Sunnis.
His funeral could be held today, setting the stage for mass riots, but authorities have sometimes held on to bodies for weeks.