I don't use Chrome much but for FF, under Tools-Options
I had it set as "Always ask" before, but changed my to this (pulldown showed "Use Adobe Acrobat in FireFox" as an option). When I go to a site, it will still ask if 'I want to allow (or did in same session) but I can mark it to always accept for a URL.
Might not help you, since you use Chrome, but may be helpful for others.