Fixes the width when viewing Youtube desktop mode on small screen device, useful when your using add-ons that is only available on desktop mode, ex: Comet - Reddit Comments on YouTube & Webpages, *use https://addons.mozilla.org/en-US/firefox/addon/uaswitcher/ some add-ons like comet works only when url don't contain "app=desktop"
*use https://addons.mozilla.org/en-US/firefox/addon/uaswitcher/ some add-ons like comet works only when url don't contain "app=desktop"
