If I have a bookmark with one or more query parameters, and navigate to a different page where only the query is different, the icon badge will remain dark blue, indicating that bukubrow thinks the current page is bookmarked.

This is especially common when managing webcomics, as many sites use query parameters to indicate the current comic page.

Screenshot below. I overlaid an example of the "same domain, different URL" badge (green arrow), to show the contrast: