As a general rule, your landlord cannot see what you are browsing on the internet. However, there are some circumstances in which your landlord may be able to access your internet activity. For example, if you are using the internet connection provided by your landlord, they may have access to the router and could potentially see what websites you are visiting. Additionally, if you are using a shared computer in a common area of the rental property (such as the office or lounge), your landlord could potentially see your browsing history. Finally, if you give your landlord permission to access your computer or internet account, they will be able to see everything you do online. If you are concerned about privacy, it is best to use a personal device that is not connected to the rental property's network and to keep any sensitive information (such as passwords) stored securely.