You can use { -brand-name-firefox } and still have { -brand-name-chrome }. { -brand-name-chrome } won’t change on your machine one bit.
Yatikïr nawokisaj { -brand-name-firefox } chuqa' k'o awik'in ri { -brand-name-chrome }. Ri { -brand-name-chrome } majun b'it xtijalwachitäj chi re.