I have one site that I need to use but I cannot due to a pop up blocker.
I work on an IMac. How can I get rid of the blocker on that site?
Normally Firefox displays an infobar below the address bar that lets you make an exception for the site. If that isn't coming up, you can add the site by hand here:
Firefox > Preferences > Content
Click the Exceptions button to the right of "Block pop-up windows" and add the site there, clicking Allow.
If that doesn't work, perhaps you have a security-related add-on that is blocking the pop-up?