Eddie Vedder has joined Instagram to teach fans how to vote by mail in the upcoming US presidential election.The Pearl Jam frontman made his first post on the @eddievedder account earlier this week (September 1), posting a logo of his initials.In the following days, he shared a step-by-step guide to the mail-in voting process. “Hope you’re well and hanging tough in these extraordinary times,” he captioned the first post.