Zooming

You can use a ‘Pinch’ gesture to control the zoom level in both playpen & island views. Zooming out sufficiently will have you in Island View, zooming in from Island View will open a playpen.

Troubleshooting

Firefox on Linux?

In some Linux distributions, Firefox may not handle multi-touch gestures by default.

You may have luck setting the MOZ_USE_XINPUT2 environment variable to 1. You may need to restart your computer for this change to take effect.

If that doesn’t work, please check the about:config page in Firefox. After passing the ‘Proceed with Caution’ warning, see if the dom.w3c_touch_events.enabled preference is set to 0. If it is, you can try setting it to 1. Then close & re-open Firefox.