I just uninstalled a highly suspicious extension, called: Custom Javascript for Websites 3.
This is currently available on the google store and is using exactly the same icon of this extension.
In the description the dev describes how they finally managed to fix this or that bug, and how he improved this or that feature, basically doing all they can to build a sense of continuity with the past...
But as soon as I realized how none of those pages made the slightest reference about open source software, I immediately uninstalled it, reported all this to google...
Please do the same, in your own interest and to protect the devs working on this project from any bad associations.