When trying to read a pdf online banking statement the above message pops up, so i can not view it. What settings do i need to make, or add ons to view it.
You can use Adobe reader. Got to plugins and make sure it is on. You could also use Foxit Reader. I hope this helps. 
Yes thanks all done now, foxit plugin was disabled so now enabled all fine.
Glad to hear you got the problem fixed.