Ask HN: Someone copied my Chrome extension, is there anything I can do?

Someone copied my extension, changed the name, then released it on the chrome webstore. My code is open source, so I get that they are allowed to do whatever they want with it, but it seems unfair that they can take the code and make their own extension with no changes. Actually, they do have some changes: they collect user data and webpage content. The person also claims to be "ex-FANG", which just makes it worse.

I only recently wrote the extension and it doesn't have that many users, but it is one of my first projects and it's a project that I am proud of. I'm sad to see it so blatantly copied like this. Is there anything I can do or is this just the reality of open source?