Do you mean this?

• Tools > Options > Privacy > Firefox will: "Use custom settings for history" > "Remember search and form history"
• https://support.mozilla.org/kb/Form+autocomplete

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Firefox only has a window to manage passwords, but not for managing form data.
If you had such a window for form data then only an extension may have added this feature.
You may have been using one of the form fill extensions in the past.

• Autofill Forms: https://addons.mozilla.org/firefox/addon/autofill-forms/

Use these steps to remove saved (form) data from a drop down list:

1. Click the (empty) input field on the web page to open the drop down list
2. Highlight an entry in the drop down list
3. Press the Delete key (on Mac: Shift+Delete) to remove it.

• http://kb.mozillazine.org/Deleting_autocomplete_entries

• https://support.mozilla.com/kb/Clearing+Location+bar+history
• https://support.mozilla.com/kb/Cannot+clear+Location+bar+history

No sorry I mean [https://support.mozilla.org/en-US/kb/awesome-bar-find-your-bookmarks-hist...]

The Autofill feature of the Awesombar, not forms

This applies to all drop down lists, so it also works to remove individual items from the location bar drop down list, both autocomplete and the list the opens via the arrow at the far right.
Highlight, but not click, an item in the drop down list and press the Delete key to remove that entry.

Bookmarked items that have a yellow highlighted star can only be removed permanently by removing the bookmark.

I think you misunderstood me I mean the inline Autofill of the location bar.

Take a look at the picture. I have typed "li" and the address "listen.grooveshark.com" is the one getting auto filled even though I haven't visited it for ages, as the behaviour of the dropdown list shows, it's the last result.

What I would like is the autofill to use the top result of the dropdown list to auto fill the url.

Does this extension work?

• Enter Selects: https://addons.mozilla.org/firefox/addon/enter-selects/

Yeah the plugin does what it says. I hope Mozilla will eventually fix the autofill behavior to better match the Awesomebar suggestions but I guess this will do for now, I was hoping it would be possible to do without an addon though.

Thanks!