 However, despite efforts of projects like Gnash, Swfdec and Lightspark, a complete free Flash player is yet to be seen, as of September 2011.For example, Gnash cannot use SWF v10 yet.Notably, Gnash was listed on the Free Software Foundation's high priority list, from at least 2007, to its overdue removal in January 2017.

Notable advocates of free software, open standards, and the World Wide Web have warned against the use of Flash