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About this Add-on
This add-on adds a button on the toolbar to toggle between:
- the default Firefox behavior of allowing some pop-ups, and
- blocking all pop-up windows.
This is to make the transition to Firefox 57, which will not support legacy add-ons, smoother.
This add-on will not be updated for Firefox 57 and will stop working because web-extensions add-ons can't change Firefox's preferences.