How to pronounce “firefighting”(verb) in English

Is it the 'V' or the 'O'? >>Audience Member: Les McKeown: It's the 'O'. Of course it is. The 'V' is having too many more brightideas. So the 'O' has become a firefighter. The 'O' is firefighting. The problem is, here's the arsonist. A lot of the firefighting is happening because 'Vs' like to walk aroundwith a book of matches. Whoosh. Let's open an office in Mongolia. Whoosh.