Examine source code of QFeeds

{
  "manifest_version": 2,
  "name": "QFeeds",
  "version": "0.14.0",
  "short_name": "qfeeds",
  "description": "Reader of RSS feeds",
  "browser_specific_settings": {
    "gecko": {
      "id": "{2df366ca-28d2-11e8-9c70-b7b0d99bd061}",
      "strict_min_version": "120.0"
    }
  },
  "icons": {
    "128": "chrome/icon_rss.png"
  },
  "permissions": [
    "identity",
    "downloads",
    "tabs",
    "http://*/",
    "https://*/"
  ],
  "content_security_policy": "script-src 'self'; object-src 'self'",
  "content_scripts": [
    {
      "js": [
        "chrome/sniff_common.js",
        "chrome/doc_start.js"
      ],
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "run_at": "document_start"
    },
    {
      "js": [
        "chrome/sniff_common.js",
        "chrome/feed_finder.js"
      ],
      "matches": [
        "http://*/*",
        "https://*/*"
      ]
    }
  ],
  "browser_action": {
    "default_title": "QFeeds (devel)",
    "default_icon": "chrome/icon_rss.png"
  },
  "background": {
    "scripts": [
      "chrome/background.js"
    ]
  }
}