Browner, 29, was suspended indefinitely in December for violating the NFL's substance-abuse policy causing him to miss the Seahawks run to the Super Bowl. At the time that Browner was suspended, he was sitting out with a groin injury.
Just last week, Browner had planned to sue the NFL, challenging the league's decision to suspend him. He is set to become a free agent next week.
In 2012, he served a four-game suspension for violating the performance-enhancing drug policy. That suspension was separate from the league's substance-abuse program.
"I received wonderful news today. The NFL has reinstated me, and I now have the opportunity to prove to the fans and my teammates how important this sport is to me," Browner wrote on Twitter. "I realize now more than ever that being part of the NFL is not a right, but a privilege. I am grateful that Commissioner Goodell and my agent were able to resolve this issue in a positive, productive manner so I can continue my career, provide for my family, and help my team win a Super Bowl. Thank you to all who have gone out of their way to show their support. I will live up to your expectations of me."