Company is installing zscaler on our laptops

We are a very small company with minimal infrastructure and they have never in the past installed software on to our computers (even though they were issued by the company)

I know in short zscaler allows them to see all our internet traffic. Does it allow them to see what I’ve done in the past? Like personal emails I’ve sent from my personal email account or my personal social media pages? Is cleaning my browser history pre install worth doing …

computers infrastructure internet internet traffic laptops privacy software the company traffic zscaler