Short answers, pulled from the story.
Huntington Bank Field opened in July 1999 with its first regular-season Browns game played on the evening of the 12th of September 1999. A 43-0 loss to the Pittsburgh Steelers marked this occasion.
The stadium was designed by Populous, which was known at the time as the Sport Venue Event Division of Hellmuth, Obata & Kassabaum (HOK). The construction of the concrete superstructure took more than 6,000 truckloads of concrete weighing approximately 180,000 tons.
Cleveland City Council passed a resolution in June 2022 urging FirstEnergy to relinquish its naming rights due to the Ohio nuclear bribery scandal. The Browns announced on the 13th of April 2023 that the team and FirstEnergy had come to an agreement to immediately terminate the naming rights deal.
Haslam Sports Group announced on the 3rd of September 2024 they had sold naming rights to Huntington Bank. This is based in Columbus, Ohio, in a 20-year partnership agreement.
Through the 2023 season, Huntington Bank Field is the only NFL venue that has yet to host a postseason game of any kind. The Browns are one of five teams who have yet to host a home playoff game in their current stadium.