{ -brand-name-firefox } themes let you change your browser’s appearance. They set the color scheme for browser menus and { -brand-name-firefox } system pages, and can even add a background image to your { -brand-name-firefox } toolbar.
Mae themâu { -brand-name-firefox } yn gadael i chi newid golwg eich porwr. Maen nhw'n gosod y cynllun lliwiau ar gyfer dewislenni porwr a thudalennau system { -brand-name-firefox }, a gallan nhw hefyd ychwanegu delwedd gefndir i'ch bar offer { -brand-name-firefox }.