If you’re running 64-bit { -brand-name-windows } (<a href="{ $version }">here’s how to check</a>), your { -brand-name-firefox } may already be 64-bit. <a href="{ $check }">Check your { -brand-name-firefox } version</a> (in the “About { -brand-name-firefox }” window) and look for “(32-bit)” or “(64-bit)” after the version number:
Os ydych chi'n rhedeg { -brand-name-windows } 64-did (<a href="{ $version }">dyma sut i wirio</a>), efallai bod eich { -brand-name-firefox } eisoes yn 64-did. <a href="{ $check }">Gwiriwch eich fersiwn { -brand-name-firefox }</a> (yn y ffenestr “Ynghylch { -brand-name-firefox }”) a chwiliwch am “(32-did)” neu “(64-did)” ar ôl y fersiwn rhif: