Jennifer Aniston has a mass following on social media with over 38 million followers and often uses it to do good.MORE: Jennifer Aniston shares intimate bedroom selfieAnd over the weekend, the Friends star did just that, as she helped spread the word of a missing dog.In an emotional Instagram post, Jennifer shared details of missing dog Stormi, who has been missing since 9 September.VIDEO: Jennifer Aniston shares a glimpse inside her pristine garden in LAShe wrote alongside a black-and-white