just because you see some behavior with parabola's icecat does not necessarily imply that GNU has that same behavior - the same is true for most every program - it is always best to file bug reports on your distro's bug tracker, unless you firstly try the version released by the upstream and determine that the same bug is present in the upstream realease
so, on this mailing list, the first question to ask is: "can this behavior be reproduced in GNU icecat?" -- http://gnuzilla.gnu.org
