You can use { -brand-name-firefox } and still have { -brand-name-chrome }. { -brand-name-chrome } won’t change on your machine one bit.
Tzemreḍ ad tesqedceḍ { -brand-name-firefox }ɣas ma teǧǧiḍ { -brand-name-chrome }. Asebeddi n ur yettbeddil ara.