[jaytemple]

Thanks. Surprised there isn't an extension to allow toggling on/off.

[Sujeto]

Could just be an about:config flag, that would be better than having to apply userChrome.css on every profile where you need it.

[PurpleRamen]

Mozilla seems to see potential for abuse with this, which is why they are not offering an API for this.

[pfcao]

I think it is because firefox wants to keep the same extention api with chrome.

[catach]

Regretfully Mozilla hasn't gotten around to providing the API for that.