I just got a new MBP, and use Firefox as my browser. Somehow, I inadvertently (stupidly?) set Adobe indesign as my default application to open pdf files, INSTEAD OF ADOBE ACROBAT. Now every time I try to open a pdf file from Firefox, it opens indd and then gives an error message. Included is a suggestion to change the default in Preferences in Firefox. When I look into Preferences I can't find WHERE to change it. H-E-L-P!! And, thanks.