I'am not sure if you read the website mate but it could be permanant , on the website it says :
Remember: this is only a alpha preview. Do not expect stable software yet. Right now it is only available for Chrome/Chromium browsers.
IMPORTANT The wallet is Not Stable or Safe, and at this point you should use it with real money only at Your Own Risk.
Why you left all the existing and stable version of wallets to use that specific wallet , if it's for being annonymus then you could simply use Bitmixer.io for the moment instead of taking risks with your BTC , wasen't really a smart move .