Changes

:The official closed-source implementation by Adobe, who discontinued it in 2020. The web version relies on [[wikipedia:NPAPI|NPAPI/PPAPI]], an obsolete in-browser plugin system that none for many years only stuck around specifically because of the major browser vendors are using anymorethis Flash plugin; in when the years leading up to Flash's discontinuationplugin was officially dropped by Adobe, many vendors were only keeping so too was the plugin system around specifically for Flashdropped by all the major browser vendors. The desktop player version is still available for download from the Adobe website's debug downloads section.

:Two C++ implementations that somewhat complement each other, and are both designed specifically to provide a FLOSS alternative to Adobe's official players. Lightspark says it has 78% of the APIs covered, while Gnash has focused on older versions of Flash that Lightspark is less likely to support properly, hence why Lightspark can use Gnash as an automatic fallback if both are installed simultaneously. Lightspark's external dependencies would make it cumbersome to port it to HTML5, so it's only available in browsers as a replacement for an NPAPI/PPAPI plugin, similar to the official Flash browser pluginone from Adobe.