Display density doesn't work in my browser (chrome on a Macbook pro) it says it only works on larger displays. Since my browser takes up all of my screen's real

Display density doesn't work in my browser (chrome on a Macbook pro) it says it only works on larger displays. Since my browser takes up all of my screen's real estate I don't understand why I am having this issue. As a side note, if you want to see a failure of customer service design, take a look at their feedback form page and count the number of unnecessary form fields.