user_pref("toolkit.legacyUserProfileCustomizations.stylesheets", true); 
user_pref("layers.acceleration.force-enabled", true);
user_pref("gfx.webrender.all", true);
user_pref("gfx.webrender.enabled", true);
user_pref("svg.context-properties.content.enabled", true);
user_pref("layout.css.backdrop-filter.enabled", true);