Better you use the minergate gui -miner , he is much more faster than the nablabee browser miner.

Minergate gui miner is for free , just register at minergate.

Its very easy, just download your suitable gui-miner at minergate and intall it.

Start the miner  , click on "show other pools" than on "other pools" and fill in coin-name: CROAT , your wallet-adress and the , pool adress: croat.pool.cat:3333

Click on "add it " and you are ready to mine .