Seems to work well and I changed the xpi to zip, looked over the code, and it seemed clean to me! I disabled auto updates for the extension just in case, because clearly the extension's original repository is dead. Also the fact that there's "resigned" in the file name is not a good sign, but, again, the code looks fine!! I wish these reviews about malware would specify in what file(s) and on what line(s) is the malicious code. I use this addon with noscript cause it adds a simple switch that I can put on the taskbar and it can just simply disable a single tab's js temporarily (until tab is closed). Which is nice when I don't want to completely unload the tab or block the associated sites or anything like that. I just want it to stop executing it's code temporarily. Also, Author; Please migrate your codebase to somewhere. Dude your github repo is gone obviously and even the web archive containing a copy of your github repo/issues just doesn't exist anymore.