How to run it?

[lattice0]

No information of how it is developed, which technologies are used. Do I really need chrome to run it?

[edorgeville]

All infos to run the app are in the README.
Used technologies are listed in the package.json.

[lattice0]

What is the .zip for? Looks like it has node dependencies but they are just for building, right?

[edorgeville]

Are you referring to the .zip in the Release tab ? It looks like the .zip is the unsigned/unpackaged Chrome application while the .crx is the signed and packaged version. The same you would download on the Chrome store.

[pollastri-pierre]

Exactly the zip is the unsigned application and the crx is just a zip with a signature. Node is only used to build the sources.