How does the 'Remove effects' option work?

In Valentine's Day, it is possible to automatically stop the animation effect and remove the top and bottom decoration after some time with a single click.

When the option 'After a certain time' is selected, the falling hearts animation and the decoration will vanish after some time. This will be applied every time when a new page is loaded or refreshed. 

Otherwise, when the option 'Never' is selected, the app effects and decoration will be displayed on the page till you navigate to another page.