User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8.1.2pre) Gecko/20070125 BonEcho/2.0.0.2pre Build Identifier: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8.1.2pre) Gecko/20070125 BonEcho/2.0.0.2pre A menupopup with dir="rtl" should place the arrow/button that you click to expand the popup on the left side the way it does in a select tag in HTML. It looks much nicer that way and it also gets around a bug in Gnome that causes the text to be hidden under the arrow/button. You can see the problem in action if you look at the Firefox settings in a Hebrew version of Firefox installed on a Linux machine running Gnome. Reproducible: Always

Mass-assigning the new rtl keyword to RTL-related (see bug 349193).