The author uses a really excited tone and frequent questions like You know what? Guess what? Wow! Boom! Exaggeration obviously, but I like to connect emotionally with the author of whatever I am reading.
You can understand a lot more that way than words can convey.
I was not able to keep up with such an enthusiastic post that's all.
I suppose the author was expecting that people who read the article already knew what it's all about (i.e. the context) - switching browsers because of manifest version changes made by Google, and some "concerns" that people have about Firefox compared to Chrome. But that part is conveyed in the first two sentences of the article.
In the end, he is just "excited" to help people switch to Firefox, that's all.
