Examine source code of Reddit Sentiment Analyzer

{
  "manifest_version": 3,
  "name": "Reddit Sentiment Analyzer",
  "version": "1.3.0",
  "description": "Color-codes Reddit comments by sentiment. Green = positive, red = negative, gray = neutral. See the mood of any thread at a glance without reading 500 comments.",
  "browser_specific_settings": {
    "gecko": {
      "id": "reddit-sentiment-analyzer@chickenmeatteen",
      "strict_min_version": "115.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "storage",
    "tabs"
  ],
  "host_permissions": [
    "https://www.reddit.com/*",
    "https://new.reddit.com/*",
    "https://old.reddit.com/*",
    "https://sh.reddit.com/*"
  ],
  "action": {
    "default_popup": "popup/popup.html",
    "default_title": "Reddit Sentiment Analyzer",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.reddit.com/*",
        "https://new.reddit.com/*",
        "https://old.reddit.com/*",
        "https://sh.reddit.com/*"
      ],
      "js": [
        "lib/afinn.js",
        "lib/i18n-lexicon.js",
        "lib/sentiment.js",
        "content/content.js"
      ],
      "css": [
        "content/content.css"
      ],
      "run_at": "document_idle"
    }
  ]
}