Complex sentence: An open source project, "InstaBrowser", had appeared in July 2007, mimicking the ideas of Ghostzilla, and by September 2009 this project had been renamed "Ninja Browser", but it, again, proved to be short-lived.
Split into simpler sentences: An open source project, "InstaBrowser", appeared in July 2007 mimicking the ideas of Ghostzilla. By September 2009 this project had been renamed "Ninja Browser", but it again proved to be short-lived.