{ -brand-name-firefox-developer-edition } is the blazing fast browser that offers cutting edge developer tools and latest features like CSS Grid support and framework debugging
Mae { -brand-name-firefox-developer-edition } yn borwr eithriadol o gyflym sy'n cynnig offer datblygwyr blaengar a'r nodweddion diweddaraf fel cefnogaeth i CSS Grid a fframwaith dadfygio