Latest Flash Player plugin in XPI package


Warning: Firefox v57+ has disabled XPI compatibility. These addons won't install and update automagically like in previous versions. XPI containers still could be used as archive (download and rename to *.zip) with Flash player DLL inside.


Install flashplay 32-bit xpi v30.0.0.154
Alt: Flashplay 32-bit signed xpi v30.0.0.134 Signed by Mozilla

flashplay.xpi archive contents:
chrome.manifest Plugin name and some params
install.rdf XML config for browser
plugins/NPSWF32.dll Main Flash player DLL
plugins/FlashPlayerPlugin.exe Sort of sandbox (required for Windows 7 and Vista)
plugins/plugin.vch DRM keys for streaming video support

Install flashplay 64-bit xpi v30.0.0.154
Alt: Flashplay 64-bit signed xpi v30.0.0.134 Signed by Mozilla

flashplay64.xpi archive contents:
chrome.manifest Plugin name and some params
install.rdf XML config for browser
plugins/NPSWF64.dll Main Flash player DLL
plugins/plugin.vch DRM keys for streaming video support

Alternative package:

If your browser does not allow you to install custom add-ons (btw are you sure this is your browser?) there are XPI on the official Mozilla add-ons hosting. Not fullscreen-patched, later updates but signed by Mozilla:
Playflash 32-bit xpi
Playflash 64-bit xpi