Firefox 3.5 (Mac) - Using the Pop-Up Blocker
This document explains how to enable and disable Firefox's pop-up blocker. For general information on pop-up blockers, see Pop-Up Blocker - FAQ.
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Click Firefox, and then select Preferences.

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Go to the Content tab. You can toggle the pop-up blocker by checking or unchecking the box for Block pop-up windows.

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Additionally, you can specify which websites are allowed to open pop-up windows by clicking Exceptions...

