Your browser stores a lot of information of interest to an attacker: social networks, mail, bank, and more. Therefore, it is better to protect the browser with third-party methods, because you cannot put a password using standard methods.**
This will help the extension for desktop browsers - PassBrow. Each time you log in, you will be prompted for a password. The extension is available on browsers: Chrome , Edge , Firefox , Brave. After installing the plugin, the settings tab will open. Set a password and the extension will start working.
Grant the app the required permissions. Click on the browser in the list and select a blocking method. Done, now, when logging in, the browser will ask for authorization with the selected blocking method.