There were a few moments where Firefox seemed to stumble a bit and I did give Chrome a try. Otherwise, Firefox has been my primary browser for ages. Even to the point where I was using a portable version on a locked down computer ages ago. It just works and it respects me as a user.
One option is to see if you have the ability to purchase Office 2019 or 2021 for home use through school or an employer. I’ve been able to purchase both versions for US$20. It’s cheap and legal. Now, installing it under Linux is another conversation altogether.