Could you give more details please? Like which dpi settings are you using in gnome? Did you change firefox config (what is the value of layout.css.dpi in about:config) ? And finally, how do you notice it has no effects?
-- Firefox does not pay attention to GNOME DPI setting https://launchpad.net/bugs/19524 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs