Error Unity Web Player 5.3

Hello,
Today I installed the new version of Unity Web Player 5.3. I use it on Firefox 43.0.1/Windows XP SP3 and now I cannot play content using Unity on miniclip.com. When loading the game the browser gives me the message “The browser could not allocate enough memory for the WebGL content. If you are the developer of this content, try allocating less memory to your WebGL build in the WebGL player settings.”
I have 2 GB of RAM on my PC and previously I had no problems running games with Unity Web Player.

Unity WebGL is very different compared to the Web Player. The memory requirements are still high so depending on the content, 2GB might not be enough at the moment.

Is there any specific miniclip.com content that you are unable to play ?

It seems that now all Unity games fail to load - for example Bow Master Japan

I don’t know what is going on and if Miniclip made some changes. But the strange thing is that previously the games were played using plugin Unity web player and now on the screen loads Unity - but it seems that this is Unity WebGL.
Is there any way to make Firefox use the Unity plugin instead of Unity WebGL?

It’s an WebGL game and this game work fine for me.
Unity web player will be deprecated in a lot of web browsers in 2016.
That mean that the future for the browser gaming is the WebGL.