
1) Discontinued web browser
Found on
https://www.crosswordclues.com/clue/ghostzilla

Ghostzilla was an open source web browser for Microsoft Windows based on Mozilla Application Suite 1.0.1. It ran the browser inside the window space of another application (e.g. in Microsoft Outlook), where the page was then made to look like the content in an email. When moving the cursor out of the window, the browser subsequently disappeared. =...
Found on
http://en.wikipedia.org/wiki/Ghostzilla
No exact match found.