I Have a firefox 52.8 running on a Red Hat Linux server. Page rendering seems slow and in an overlapping manner. I need to add below addons to customize fonts and zoom level to fix the rendering issues of pages on firefox. Please help me how can i add these globally so that any new user would also have these addons. Default FullZoom Level: https://addons.mozilla.org/firefox/addon/default-fullzoom-level/ NoSquint: https://addons.mozilla.org/firefox/addon/nosquint/