I usually disabled "Send HTTP Referer Header" for protect privacy reason.
But sometimes, "Send HTTP Referer Header" was required for Web site authentication.
So, I enabled it and disabled it after leave such Web site.
Unfortunately, sometimes I forgot disable it and made privacy weakness.
Then I thought I would like to be able to disable "Send HTTP Referer Header" when start Firefox.
This is why I developed this addon.
Important Information: 2016/03/16
Mozilla is changing a lot of things about add-on development again. So this addon might be stop working in the future.
"The Future of Developing Firefox Add-ons | Mozilla Add-ons Blog"
"Add-ons/developer/communication - MozillaWiki - Upcoming Changes in Add-on Development"https://wiki.mozilla.org/Add-ons/developer/communication#Upcoming_Changes_in_Add-on_Development