Browne started racing in Irish and British karting competitions before moving into the UK's Formula Ford championship in 2018.

Browne also dominated the Formula Ford Festival in 2019, winning from pole for Cliff Dempsey Racing.

[11][12] His second year bore more fruit, as Browne took third place at Road America after a brief battle for the lead with Lirim Zendeli and Francesco Pizzi and capped off the season by finishing third at Portland.

[15][16] After two years in the third-tier feeder series, Browne progressed to Indy NXT in 2024, driving for HMD Motorsports.

[17][18] He finished inside the top ten in eight of the 14 races but lacked any standout results, leaving him 13th at season's end, third-lowest of all full-time entrants.