A zero-permission Chrome extension for checking mouse buttons and wheel input in a small, private popup.
- Left, middle, and right mouse buttons
- Back and forward side buttons
- Scroll-wheel input and direction
- Per-input event counts
All input is processed locally in the popup. The extension requests no Chrome permissions, uses no analytics, and sends no test data anywhere.
- Download the source from the latest release, or clone this repository.
- Open
chrome://extensionsin Chrome. - Enable Developer mode.
- Select Load unpacked and choose the directory containing
manifest.json. - Open the extension and test inside the central mouse area.
| Input detection | More tools |
|---|---|
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The links under More Tools open optional tests on MouseTesting.org. They run only after you click a link.
See PRIVACY.md for the data-handling statement and SECURITY.md for responsible disclosure instructions.


