Rated 5 out of 5 stars
Hi! Thanks for the extension. I don't know how to contact you, but you may want to consider making your extension compatible with seamonkey, too.
Everything you need to do is to add this like to chrome.manifest:
overlay chrome://navigator/content/navigator.xul chrome://screenshoter/content/ff-overlay.xul
And add Seamonkey application in install.rdf: