This nwjs program appears to share a name with Nwjs.exe which is a Trojan virus, however as far as I can tell from my (admittedly limited) information these two programs are not the same. I cannot find definitive information as to whether or not this is a harmful program, however, and I have found even less information on how to safely remove it.

From what I have gathered this nwjs I am dealing with is just a javascript tool or something like that and it's ultimately harmless apart from the mental damage I get every time I see a new ad pop up. I have no idea how this got on my system, it's been on here for a good month at least I'd say.

Got up this morning, went to the mac, and there on the screen was a 'nw.js' splash screen. It was a running application - had a menu bar with a quit function, but I've never heard of this or knowingly installed it. I immediately quit out of the app, and looked around in Activity Monitor for any suspicious looking processes running. The only thing running at the time was Vuze, Thunderbird, and Chrome. Scanning through the console logs I saw that Chrome executed a software update around 5:30 am, but I'd be surprised if Google suddenly decided to start bundling node.js with their browser. There was a software update from Apple pending, so I ran that, and I can't see anything else suspicious in my console logs other than the usual shenanigans that surrounds an Apple software update. Still, most disturbing that there was software suddenly running on my machine that I didn't elect to install. Doing a 'locate nw.js' in the terminal turned up nothing either.

Any ideas wtf this was?

Look at the image