Hello charlie_chan. Welcome to Sony Community and thank you for your post.
The Blu-ray Disc (BD) Player does not support Adobe Flash content. If the icon for installing Adobe flash is selected when using the web browser, the message not supported on the device will appear on the screen.
It is not possible to update the Flash plugin in the BD Player. This can only be done by a firmware update release.
Use a computer or other Internet device that supports flash content to view these pages.