Did you try to drag a link to such a deleted web page into one of the slots?

Changes manually made on the about:newtab page are stored in the chromeappsstore.sqlite file in the Firefox Profile Folder under the pinnedLinks key and blockedLinks key.

You can use this button to go to the Firefox profile folder:

• Help > Troubleshooting Information > Profile Directory: Open Containing Folder

• http://kb.mozillazine.org/Profile_folder_-_Firefox

thanks

You're welcome

How do I edit the string when it only has one URL in it (that I want to remove)?

Just remove the URL and change batwen.:aboutblockedLinks{"URL":1} into batwen.:aboutblockedLinks{"":1} ???

Or is there more involved?

And can it be done in Notepad ++? (Excel only opens as a Read Only)

You can only edit the content of the chromeappsstore.sqlite file with an SQLIte manager like this Firefox extension:

• SQLite Manager: https://addons.mozilla.org/firefox/addon/sqlite-manager/

1. open Profile Directory -> chromeappsstore.sqlite -> Go
2. open Table > webappsstore2
3. select the "Browse & Search" tab to see all entries in that table

You can select the "batwen.:about" "blockedLinks" line and click the Delete button on the toolbar to remove that record and reset the deleted sites.