Well, it could als also be argued that Chrome _is_ more secure, for example because it uses app-bound encryption using Windows DPAPI system, for cookies, so that it at least tries to protect cookies from malicious applications running on the device. Firefox does not do this: https://security.stackexchange.com/questions/279629/are-cook...
If course the reverse can also be argued, for example that Firefox supports proper adblocking.
Not really a serious argument when you are accessing a Google product. Sure, don't want to interact with Google? Don't interact with Google, but logging into Google workspaces with Firefox definitely isn't protecting your data from Google.
If course the reverse can also be argued, for example that Firefox supports proper adblocking.