Default Not able to update to latest Dolphin browser

I am running dolphin browser HD v10 and i know that the latest version is 11 but i am not able to see an update in play store. My friend who has nexus 4 runs v11. I know versions vary from devices, so doesnt nexus 5 support the latest version?
X10 Slimbeanv2.0 with FeraKernel JB - V1.1 Test |

Xperia S running stock

Samsung Galaxy Nexus i9250m with Omni ROM and franco kernel

Nexus 5 with CM11 and Chaos kernel