Browne, whose large family dominated the politics of county Mayo, continued to sit for the seat vacated there by his father in 1818 with the support of his cousin the 2nd marquess of Sligo. At the 1820 general election he was returned unopposed.
At the 1826 general election he stood again, defending the conduct of his family, against whom an independent opposition had been started. (The Catholic press observed that Browne himself was ‘not disliked’ and that the ‘whole enmity’ was against his father.) Following the withdrawal of his colleague at the last minute he was returned unopposed. After the declaration a fatal affray broke out, and ‘in his exertions to save himself’ Browne drove his carriage ‘over friends and foes’, including a clergyman, ‘who very nearly paid the forfeit of his life’.
Browne is an excellent nominee, but he is gouty and indolent. I have had occasion to press him more than once, but for years he has uniformly refused. He is therefore not to be depended on, though I will ask him.Add. 38748, f. 208.
He voted for Catholic claims, 6 Mar., and with Canning’s ministry against the disfranchisement of Penryn, 28 May 1827. He was appointed to the select committee on Irish grand juries, 6 June. On 20 June 1827 he described the physical assault he had suffered at the last election and moved unsuccessfully for a copy of the inquiry into the conduct of the police and the murder.
At the 1830 general election Browne offered again, denying rumours of a coalition between him and another candidate. After a five-day contest he was returned at the head of the poll.
