Hello, I have been having issues with playing youtube videos, and so I tried to see if I could remedy the problem. Well, not only was I unsuccessful, I somehow managed to disable the full screen feature in the process. Without knowing what I did to cause that to happen I had no idea how to undo it, so I tried refreshing firefox thinking that might help. Now I am presented with a box that tells me to choose 1 of 2 default profiles, or I have the options to delete, rename, or create a profile. As noted, I know very little about computers and have no idea which choice to make, or for that matter why to make it. Clearly this is a pretty simple issue, but I am just worried about making things worse at this point. Thanks in advance for any assistance.