Ultimate Useful Add-on Rated 5 out of 5 stars
This add-on helps hiding web elements.
You will push"Shift + Ctrl + S"then you can choose elements what you want hide.
If your ff4 installs ADBP, you also must install this,I think.
But,Element Hiding is enabled only domain.This is bad.This must be fix until next release.
Or,be useful for light ABDP user when we want hide element or image,something text-box,etc.