Original sentence: As of February 2009, Gnash and Swfdec have seen very limited success in competing with Adobe's player.The fact that many important and popular websites expect users to have Adobe's player, combined with the lack of good free alternatives have led to frustration among users, suggesting that this is the most common obstacle to enjoying the web in freedom, which presumably relates to the continual high ranking of Gnash on the Free Software Foundation's list of high priority projects
Edited sentence: As of June 2009, Gnash and Swfdec have seen limited success in competing with Adobe's player, and many important and popular websites expect users to have Adobe's player; Presenting Adobe's player as the only choice is the norm, and using features that are unsupported in other players is not uncommon.The lack of alternatives have led to frustration among users when Adobe's player does not work Gnash is on the Free Software Foundation's list of high priority projects