In terms of features, both Firefox and Chrome offer a large library of extensions and plug-ins, with Chrome’s catalog vastly outnumbering any other browser while nicely integrating with other Google services, like Gmail and Google Docs.
O ran nodweddion, mae Firefox a Chrome yn cynnig casgliadau mawr o estyniadau ac ychwanegion, gyda chatalog Chrome yn fwy o lawer nag unrhyw borwr arall tra'n  integreiddio'n hwylus â gwasanaethau Google eraill, fel Gmail a Google Docs.