Adblock Plus will normally add an icon to either the toolbar or the add-ons bar. If you middle-click on the icon it will disable Adblock Plus. Middle-clicking on it again will re-enable it.

Thank you for your quick response...I know I have never added any add-ons... I thought they may have just come along when I upgraded to the latest Firefox... I found no icons to click on so I added the page capture add on and an icon showed up leaving me to believe I don't have ad lock...Then I went to help and selected 'restart with add ons disabled', went to IKEA and they still claimed the add on was in place...so I dug up internet explorer and was able to download.the software.... I'm starting to think that IKEA is not friendly toward Firefox...I'm OK with that... Thanks again for your help