When you're trying to pin a tab, there are two things you need to pay attention to when you start to shake, the length of time you stay at the endpoint.

The problem is that you can accidentally unpin a tab by shaking the top of the page, so you need to be very careful to avoid that, especially when you have a lot of tabs that are pinned.

On top of that, when you're pinning a tab, you need to be careful not to bump into other tabs.

If you're having trouble, I would recommend giving it a try on a different browser or device.

If you still don't get it, feel free to contact us.