When I access the following webpage (with JavaScript enabled): http://free.grisoft.com/freeweb.php/doc/24/lng/us/tpl/v5 my Linux box become sliggish/slow because CPU usage of X server raise to > than 75%. This bug is common to all browsers using mozilla engine (firefox, epiphany, etc), it's not related to desktop environment (KDE, Gnome does not make difference), it's not related to xorg-server version (present for sure in xorg > 6.8.2) and it's not Gentoo-specific. This bug should be reported upstream.
(In reply to comment #0) > This bug should be reported upstream. Good idea, do it. ;) https://bugzilla.mozilla.org/enter_bug.cgi?product=Firefox
(In reply to comment #1) Done. See https://bugzilla.mozilla.org/show_bug.cgi?id=340315
Thanks.