Firefox 63.0b10 (64-bit), Windows 10. If I click on an image, the activation status of back/forward buttons is not updated. - If the back button is grayed and I click an image, the back button remains grayed and alt+left fails. - If the forward button is active and I click, it remains active even though there are no future pages (alt+right does nothing). Right-clicking the back/forward button allows correct history navigation.