It&#x27;s easier to build Chrome apps, and they are also more secure. It&#x27;s one of the reasons Mozilla is trying to move away from the add-on model and adopt WebExtensions. When it does that we should start seeing Chrome&#x2F;Firefox apps appear likely at the same time. It&#x27;s why I hope Mozilla dismisses the backlash against the switch because some people can&#x27;t live without their &quot;deep&quot; themes.