I also work in cybersecurity. Second everything this person said.

This thread is a good reminder, because at many organizations HR / management can and will look at your browser history (and computer activity in general) as a method of monitoring performance and staying in control.

But at my organization, we have never once looked at anyone's browser history (and I know that HR hasn't because they would have to go through us). We certainly could if we were asked to and we would if there was an incident (what we would care about is sensitive / confidential information getting leaked or suspicious activity on the network using a specific person's credentials, suggesting those credentials may be compromised). But in almost 2 years (we're a startup in the aerospace electronics sector) we have never once had cause to do that and we have a philosophy that happy relaxed employees who feel trusted by their employer are the kinds of employees that we want, so we wouldn't intrude that way without cause ever.