Examine source code of Web Page Fast Reader

{
  "manifest_version": 2,
  "name": "Fast Reader",
  "author": "Siegfried Keller",
  "version": "1.2",
  "description": "source available at github: github.com/k3ll3x",
  "icons": {
    "48": "icon.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "exclude_matches": [
        "*://*.netflix.com/*"
      ],
      "js": [
        "main.js"
      ]
    },
    {
      "matches": [
        "*://*.netflix.com/watch/*"
      ],
      "js": [
        "video-buttons.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{c3448386-4129-4eaa-9b34-1e16ad49deca}"
    }
  }
}