It doesn't work correctly. The same Chrome plugin works fine. This one doesn't. For example, I set it to open a page every day at 6:00 a.m. I launch Chrome at 8:00 a.m., and the page opens. I launch Firefox with the same configuration, and the page only opens if I have the browser open at 6:00 a.m. If I launch it later, a page won't open at all.