Examine source code of Content Plow for Reddit

{
  "manifest_version": 2,
  "name": "Content Plow for Reddit",
  "version": "0.7",
  "description": "Easily create new submissions on Reddit.com",
  "homepage_url": "https://github.com/rbaker2019/contentplowforreddit",
  "author": "rbaker2019",
  "applications": {
    "gecko": {
      "id": "{b16335c7-f147-4236-b66b-ea68c83c6a75}",
      "strict_min_version": "60.0"
    }
  },
  "permissions": [
    "storage",
    "tabs",
    "contextMenus",
    "<all_urls>",
    "webRequest"
  ],
  "icons": {
    "48": "icons/icons8-plow-48.png",
    "96": "icons/icons8-plow-96.png"
  },
  "browser_action": {
    "default_icon": "icons/icons8-plow-32.png",
    "default_title": "Content Plow for Reddit",
    "default_popup": "popup/settings.html"
  },
  "background": {
    "scripts": [
      "src/background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.twitter.com/*"
      ],
      "js": [
        "siteHandlers/twitter.js"
      ]
    }
  ]
}