Hi, if you click on the star once, the bookmark will go into Unsorted Bookmarks. However if you wish the bookmark to go to a different destination, you should click on the star twice, then in the dialog box, use the upper, downward pointing arrow on the far right, to select a destination > Done.

The following may also be of help - Bookmarks in Firefox.

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Just to be sure that you understand how it works:

• Clicking the star on the Navigation toolbar will bookmark the page in the "Unsorted Bookmarks" folder and the star turns blue to show that
• Bookmarks > "Bookmark This Page" (Ctrl+D) will bookmark the page in the Bookmarks Menu folder (you need to confirm that)
• "Bookmark This Page" can be accessed via the right-click context menu in the browsing area or via the Bookmarks menu in the Firefox menu button drop down or menu bar (Alt+B)
• If the URL in the current tab is bookmarked and the star is highlighted blue then click this highlighted star or use "Bookmark This Page/Edit This Bookmark" (Ctrl+D) to edit the properties of the bookmark like name and location and move the bookmark to another folder or remove the bookmark

You can look at this extension:

• Add Bookmark Here 2: https://addons.mozilla.org/firefox/addon/add-bookmark-here-2/