If this sounds like your week
Timeboxing fails when the cue hides.
A Pomodoro timer only works if it changes what you notice during the session. If it disappears into the tray or another browser tab, you are back to relying on memory.
Where tooling usually breaks
Tray icons die of neglect.
Hidden timers ask you to remember the thing you installed because remembering was already unreliable. That is a bad contract.