additional options for topSites.get added in Firefox 69 (#5271)
additional options for topSites.get added in Firefox 69 (#5271)

@freaktechnik Sorry for the delay in reviewing this, all looks good, thanks
mdn/browser-compat-data,mdn/browser-compat-data,chrisdavidmills/browser-compat-data,chrisdavidmills/browser-compat-data