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CloseReview for DOM Inspector by Ken B
Rated 5 out of 5 stars
This is a must have extension for theme and/or website developers. It can really help speed up the process of finding offending code and getting things fixed. I just can't imagine developing and maintaining Firefox themes without it.
This review is for a previous version of the add-on (2.0.3).To create your own collections, you must have a Mozilla Add-ons account.