This add-on doesn't bother you, nor make you feel under pressure. But it simply reduce the duration of your site visit.

It only wraps by a thin skin on the website when time-over. And the limit recovers soon. So you don't lost your ongoing comments or scrolling history etc.

The relationship between you and this add-on could be calm and friendly, not hostile, so it should be on your side longtime, that could change your habit without your attention.