not supporting a particular browser just means that if a bug report comes up about your product with that browser then nothing gets done, but since everyone dev

not supporting a particular browser just means that if a bug report comes up about your product with that browser then nothing gets done, but since everyone develops towards standards bugs in FF will probably be minimal, especially if they do support Safari (because unlikely something does not work in both Safari and Chrome) also the Teams link describes ways to work around limitations with teams on a particular browser that does not support the teams web app, which is what the article says FF etc. does not support.