Unclear Rated 1 out of 5 stars

No option to work on headers, nowhere to write any JS, no help. Unuseful

This review is for a previous version of the add-on (0.3.5). 

Too simple probably

Jef which options you need? the syntax is probably too simple
header:headervalue
header:${ jscode }
and comments starts with a # .

this plugin is intended to be used for modify the headers, and do it fine.
before say it's unuseful please read the documentation ( 4 line in the description ).