This is a really good idea as all too often people end up installing extensions (knowingly or unknowingly) which end up making unwanted and undesired changes to their Firefox browser. I don’t think it is going to have that big of a negative impact as this will be a way to prevent the bad extensions from being installed. Problems I could see though would be folks running a fresh install or profile and trying to install an add-on that has been abandoned by the developer. Extensions that change the homepage and search settings without user consent have become very common, just…