I use the Web in a public library, on a computer in that library. When I go to Trello, I type the letter "t" in the line and immediately the URL of Trello comes out, with the last project I worked on on this computer. I click and my Trello account opens, even though I didn't log in or enter a password. Before that, I left the program. It turns out that anyone who types "t" on this computer easily enters my account. I checked it many times, went out and again ... This is not the case with other programs, they are redirected to the password entry page.