Fix Javascript hooks on Firefox 4
Wheee. Our dream scenario: something about the Fifefox javascript interpretor changed, and our Javascript hooks no longer seem to be working right. Instead of overriding the relevant window properties with lies, we appear to be somehow disabling them, making their values unavailable, and probably actively breaking some sites as a result.
Yet one more reason to fork Firefox.
Anyways, we might be able to fix this, with some luck, in extension-land. This bug seeks to chronicle that adventure.