I noticed that firefox ignores the dpi settings, because I changed it (98) and looked at the screen :)... I have a high resolution laptop lcd I tried very high dpi settings (~160) and firefox website fonts were as tiny as before (also after restarting firefox)
Furthermore I tried layout.css.dpi at 0, that didn't do anything for me so I gave it a high value around 130 and after restarting firefox at least one website had big fonts but most of my bookmarks didn't. -- 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
