"I'm just happy to still be here," Jackson said. "... I'm going to guarantee a Super Bowl. We've been so close since I've been here the past four years. ... The sky's the limit."
Jackson's deal is worth $48.5 million, a source told NFL Network insider Jason La Canfora on Wednesday.
Jackson spoke lovingly of his father, who passed away in 2009 of pancreatic cancer, before heaping praise on his teammates: "Hands down I think we're one of the best teams in the NFL," he said.
Jackson has career totals of 230 receptions, 4,096 yards and 21 touchdowns in four seasons in Philadelphia after he was a second-round pick in 2008 out of Cal. He also has three rushing scores and a franchise-record four punt returns for touchdowns.