Hello, while I open your demo site via Mozilla fire fox 25,
demo.jomsocial.com/demos/
The edges of buttons is not smooth and good.
I don't have this problem with Chrome and IE, please check the attached file.

Hi there.

To be honest I'm not able to replicate this problem on my end, could you maybe update your FF browser to the latest 26 version and check if this issue will still occur?

Thanks a lot, You are right, The problem was related to browser.
My last question: The fields of Jomsocial 3 have responsive behavior?

While I changed the size of browser's window, the box into the field went out.
I provide a screen-shot:

Hi there.

We're very sorry but this section is not meant for any technical issue, please post this question to our technical forum section here > www.jomsocial.com/forum/support