Eich recalled that the the third edition of ECMAScript was released in 1999. "ES3 was big, and that was when Netscape was going down, so there wasn't anything after that for a while." The follow-up release, ECMAScript 4, was an attempt to work with Macromedia, then Adobe on ActionScript 3 for the Flash Player, but this effort failed, Eich said. (ECMAScript 4 was never completed.) ECMAScript 5 was finalized in December 2009 and was a "fairly conservative change to use things like strict mode," Eich said.