FireFox的几个开发相关的利器插件 Extensions for Web Designers:

Extensions for Web Designers: (16)

Aardvark 1.0
ColorZilla 0.8.3.1
Document Map 0.4
Fangs 0.9.4
Html Validator 0.7.6
Link Toolbar 1.1.0.1
Live HTTP Headers 0.11
MeasureIt 0.3.5
mozcc 1.1.0
Platypus 0.51
Popup ALT Attribute 1.3.2005092701
Quick Locale Switcher 1.2
View formatted source 0.9.3.4
View Rendered Source Chart 1.2.03
Web Developer 0.9.4
XHTML Ruby Support 1.4.2005110501