In March 1660, Browne was elected Member of Parliament for Wycombe in the Convention Parliament. There was a double return between Browne and another candidate Scott and Browne was not declared elected until 5 May 1660. He was knighted on 29 May 1660, and succeeded his father in the baronetcy in 1669.
Browne died intestate in 1684, and was buried at Debden on 23 September 1684.