Can you get fired if you diss your boss online?

Can you get fired if you diss your boss online?

The National Labor Relations Board ruled that workers have a right to talk about work conditions freely and without fear of retribution, whether the discussion takes place at the office of Facebook.

But at the same time, the board said it is ok for employers to act against a single worker ranting on the internet.

If you can’t say what you want online, is that a violation of your right to free speech?