The original comment is meant as an observation rather than an attack. It's great to see the author of the post use gmail.js to quickly get the sentiment analysis working with 30 lines of code.

The library was a fun side project and has been used by many companies (big and small) over the past few years. Its always nice to see someone make a cool extension on top of gmail.

Here is another one that came out a while ago (uses gmail.js) and on the same theme as this original post:

http://www.slate.com/blogs/xx_factor/2015/12/29/new_chrome_a...