Rated 1 out of 5 stars

for a work around until this is updated you can do the following

close firefox.
browse to the folder that holds the *.rdf file for live http header and modify the following line

3.5.*
change to
3.6.*

move the live http headers folder onto your desktop then load firefox

close firefox then
place the live http heaers folder back to where it originally was and reload firefox.

everything should work now.

This review is for a previous version of the add-on (0.15).