Major cities of Pakistan including Karachi, Rawalpindi, Peshawar, Islamabad, Lahore and Quetta saw large-scale protests on Friday against firing on Pakistan Tehreek-e-Insaf (PTI) Chairman Imran Khan a day ago. PTI supporters blocked streets and chanted slogans in favour of Imran. In Karachi, a large number of protesters gathered outside Insaf House at Shahrah-e-Faisal.The Karachi Traffic Police asked commuters to …