The good news is that they are easy to resolve. In fact, you can troubleshoot most Internet Explorer 5 problems in a matter of minutes, see if the problem was fixed.
1.After opening Firefox browser, click on Tool -> Option -> Content.
2.Locate Block pop-up windows, check or un-check to unable/disable popup block.
3.There is an Exceptions button on the right side, you can add some websites into it to receive their popup information.
1.Click Stsrt up and type cmd.exe in the searchbox, then right click cmd.exe and select Run as administrator.
2.When a new window open, type scannow/sfc and press return, it will scan and fix any error on your computer.