Updating themes for Firefox 3.6

contents.rdf is not supported anymore, you need to use chrome.manifest instead.

XUL textboxes don't have the empty attribute anymore, but isempty instead. So instead of textbox[empty="true"], you need to use textbox[isempty="true"].

The [chromedir="rtl"] and [chromedir="ltr"] selectors have been obsoleted and won't work anymore on most elements. Instead, you need to use the new :-moz-locale-dir(rtl) and :-moz-locale-dir(ltr) selectors. See also: Making sure your theme works with RTL locales.

The tabbed browser implementation no longer has a Mac-specific tabs-closebutton-box; instead, all platforms use the same names to identify the components of the tab strip.

There's a new Full Screen toolbar button available from the Customize Toolbar dialog.

• MozillaZine forum: Mozilla 1.9.2 / Firefox 3.6 theme changes
• Themes
• Building a theme