可直接顯示網頁語法
Firebug integrates with Firefox to put a wealth of development tools at your fingertips while you browse. You can edit, debug, and monitor CSS, HTML, and JavaScript live in any web page…
https://addons.mozilla.org/zh-TW/firefox/addon/1843
Firebug 1.4b1 requires Firefox 3.5b4 or higher.
