Google-chrome – Change Omnibox’s default behavior to search

It can never be fully disabled, unfortunately. You can clear your browser history (including all new history being cleared on session exit every time) and follow the below steps to get close to the desired results.

In older versions of Chrome:

1. Go to the Chrome menu on the browser toolbar
2. Click Settings
3. Click Show advanced settings (on the bottom)
4. In the Privacy section, deselect the "Use a prediction service to help complete searches and URLs typed in the address bar" checkbox

In newer versions:

4. From the Privacy and security section, click Sync and Google services
5. Disable Autocomplete searches and URLs

Keep in mind that the address bar shows matches from your browsing history, in addition to predictions. If you don't want to see matches from your browsing history, you must clear that as well.

Beyond that there is nothing more you can do. It is either all or nothing. You cannot modify the behavior of how you dismiss suggestions. Suggestions and autocomplete are the same service.

Modified from https://productforums.google.com/forum/#!topic/chrome/xooGdnKM38Y%5B1-25-false%5D

Shift+Delete (Fn+Shift+Delete on Mac laptops) is only applicable to items that have a globe icon in front of it in the address bar. As Karl.Honky and other who have mentioned that to delete history, you'll need to clear your browser history.

If you don't want to clear "all" your history, you can do the following:

1. Type chrome://history into the address bar.
2. Search for the specific history entry.
3. Select the checkbox for the entries that you'd like to delete (in front of the history entries).
4. Click "Remove selected items".
5. Click "Remove" to complete.

The entry shouldn't show up in your address bar again.

If the above doesn't work, Roger Bell has a solution which works according to commenters (although I haven't tried it myself).