Examine source code of Reddit User Tagger

{
  "manifest_version": 2,
  "name": "Reddit User Tagger",
  "version": "0.1.11",
  "permissions": [
    "storage",
    "tabs"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "reddit-marker@saphi.re",
      "strict_min_version": "57.0"
    }
  },
  "icons": {
    "48": "images/icon.png",
    "96": "images/icon@2x.png",
    "192": "images/icon@4x.png"
  },
  "background": {
    "scripts": [
      "js/common.js",
      "js/messaging.js",
      "js/background/data.js",
      "js/background/database.js",
      "js/background/tags.js",
      "js/background/background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://*.reddit.com/*"
      ],
      "js": [
        "js/common.js",
        "js/messaging.js",
        "js/content/marker.js"
      ]
    }
  ],
  "browser_action": {
    "default_icon": {
      "48": "images/icon.png",
      "96": "images/icon@2x.png",
      "192": "images/icon@4x.png"
    },
    "default_title": "Tags"
  },
  "content_security_policy": "script-src 'self'; object-src 'self'"
}