Examine source code of Block Everything YT

{
  "manifest_version": 2,
  "name": "Block Everything YT",
  "version": "1.4",
  "author": "rail5",
  "homepage_url": "https://github.com/rail5/block_everything_yt",
  "description": "This addon blocks manipulative elements on YouTube",
  "icons": {
    "128": "bc.png"
  },
  "applications": {
    "gecko": {
      "id": "rails2@rail5.org",
      "strict_min_version": "52.0"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/*"
      ],
      "css": [
        "src/block_comments_youtube.css"
      ]
    }
  ]
}