Although the Flash browser plugin is not supported on the Apple i Phone OS, Flash applications can be exported to Adobe AIR, which runs on that operating system as a native application. Asseo lamented the return to another browser war (as seen in the late 1990s).
If Flash falls out of favor, he said, web developers will either have to develop many different versions of their web sites and native applications to take into account different HTML 5 implementations, deny access to browsers that do not support their version of HTML, or dramatically reduce the functionality of their sites in order to deliver content to the least-advanced browser.
Both include features for playing audio and video within web pages, It can also be used to play some basic HTML5 browser games and integrated vector graphics are possible with both.
"HTML5" in this article sometimes refers not only to the HTML5 specification, which does not itself define ways to do animation and interactivity within web pages, Web browsers cannot render Flash media themselves, instead it is rendered primarily via the proprietary but freely available Adobe Flash Player.
Until 2008, there was no official specification which was allowed to be used to create an alternative player.
Alternative players have been developed before 2008, but they support Flash to a lesser degree than the official one.
The latest version of the Adobe Flash Player runs on Microsoft Windows, Apple OS X, RIM, QNX and Google TV.
Earlier versions run on Android 2.2-4.0.x (Flash has been released for 4.0, but Adobe has announced that they will discontinue support for Android 4.1 and higher.) (Flash 11.2), GNU/Linux (Flash 11.2, except for Pepper Flash which is maintained and distributed by Google, not Adobe), Play Station 3 (Flash 9), PSP (Flash 6).
Adobe Flash Lite runs on Wii, Symbian, Maemo Linux, Windows Mobile, and Chumby.
Apple does not allow Flash to run on i OS, the operating system which runs on i Pad, i Phone, i Pod Touch and Apple TV.
Apple stated that it has no plans to do so., versions of browsers such as Chrome, Firefox, Internet Explorer, Opera, and Safari implement HTML5 to a considerable degree.