After a recent Firefox update, I noticed an issue when trying to rearrange Containers. When I create a new Container, it is added to the bottom of the list (which is expected). However, when I try to rearrange it in Settings → Manage Containers and move it into the middle of the list, the cursor behaves as usual and turns into a plus sign, but instead of rearranging the container, Firefox opens that container in the current tab and displays only a blank white page. The container is not moved in the list at all. This behavior did not occur before the update. All I want to do is rearrange my containers in the list, but this currently seems impossible due to this behavior.