Allow "X" in browser to end user session

It would be nice it the "X" button in the browser would log out/end a user session. Staff forgets to click their initials and "log out" and it has caused some issues here with one user entering their credentials and then it pulls up another users session. TruBridge cannot provide any explanation other than the users need to sign out. Most the other web based programs we use just require an "X" to end so it's hard to change and take the extra steps/clicks to find the log out/sign out button.