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How can I restore the popup blocker info bar?

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On the popup blocker info bar (that is normally shown in yellow at the top of the firefox page, I selected the option "do not show info bar". But now, some sites require me to allow the popups and I want to restore the info bar. How do I do that?

On the popup blocker info bar (that is normally shown in yellow at the top of the firefox page, I selected the option "do not show info bar". But now, some sites require me to allow the popups and I want to restore the info bar. How do I do that?

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  1. Click "Help" | "Restart with Add-ons disabled".

  2. In the menu which appears, checkmark "Reset toolbars and Controls".

  3. Click the button called "Make changes and restart".

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Type about:config in the URL bar and hit Enter.
If you see the warning, you can confirm that you want to access that page.

Filter (at the top) = browser.popups.showPopupBlocker

Double-click that preference to toggle to True.
Then restart Firefox.