Set Cookie

Hello,

I am trying to set a cookie. Found this old post:

Hi there, I would like to ask if there is an “add” cookie solution available. If I start the webdriver again it would be awesome if the cookies of the last session would be still available (e. g. save them and use them again in another webdriver session). Best, Martin

But getting error: ERROR Execute JavaScript 3:20 Execute failed: javascript error: webDriver is not defined

Any ideas?