Web apps like Slack, Teams and Gmail decide whether you're around by watching activity on the page: mouse movement, scrolling, key presses and whether the tab is visible. When none of that happens for a few minutes, they mark you idle.
What the extension does
On a randomized timer of roughly half a minute, Windows Mouse Mover dispatches small mouse-move, scroll and key events on the pages you have open, and shows a small cursor so you can see it's running. To the page, that looks like ordinary activity.
Why it also holds a wake lock
If the screen dims or the tab becomes hidden, many apps treat that as idle too. The extension asks Chrome for a screen wake lock so the display stays on while it runs.
What it doesn't do
- It doesn't move your computer's real cursor, so it doesn't reset Windows' own idle timer.
- It doesn't affect desktop programs, only pages in the browser.
- It doesn't change statuses set by your calendar or by hand.
- It stops when Chrome closes.
Knowing those limits is the best way to decide whether it fits your setup.