You can use { -brand-name-firefox } and still have { -brand-name-chrome }. { -brand-name-chrome } won’t change on your machine one bit.
Móžośo { -brand-name-firefox } wužywaś a weto maśo hyšći { -brand-name-chrome }. { -brand-name-chrome } se za žednym nałogom njezměnijo.