|User since||July 3, 2012|
|Number of add-ons developed||0 add-ons|
|Average rating of developer's add-ons||Not yet rated|
Works with FF 13 too! Rated 5 out of 5 stars
Works on Firefox 13 on modifying the install.rdf file as mentioned by sammingo and yk2000. For me, it is the best and simplest xpath tool ever!