Examine source code of Drop Feeds RSS

{
  "manifest_version": 2,
  "default_locale": "en",
  "name": "Drop feeds",
  "description": "__MSG_manExtensionDescription__",
  "version": "1.0.17.200000002",
  "browser_specific_settings": {
    "gecko": {
      "id": "{42d52ade-6923-4f20-92d1-8db031269cc6}",
      "strict_min_version": "73.0"
    }
  },
  "icons": {
    "32": "themes/_templates/img/drop-feeds-32.png",
    "48": "themes/_templates/img/drop-feeds-48.png",
    "64": "themes/_templates/img/drop-feeds-64.png",
    "96": "themes/_templates/img/drop-feeds-96.png"
  },
  "sidebar_action": {
    "default_icon": "themes/_templates/img/drop-feeds-64.png",
    "default_title": "Drop Feeds",
    "default_panel": "html/sidebar.html"
  },
  "commands": {
    "_execute_sidebar_action": {
      "suggested_key": {
        "default": "Ctrl+Shift+U"
      }
    }
  },
  "browser_action": {
    "default_icon": "themes/_templates/img/drop-feeds-64.png"
  },
  "page_action": {
    "browser_style": true,
    "default_icon": "themes/legacy/img/subscribe-go.png",
    "default_title": "__MSG_manPageActionDefaultTitle__",
    "default_popup": "html/feedList.html"
  },
  "background": {
    "scripts": [
      "js/independent/background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "js/independent/content-script.js"
      ],
      "run_at": "document_end"
    }
  ],
  "options_ui": {
    "page": "html/options.html",
    "browser_style": true
  },
  "web_accessible_resources": [
    "resources/highlighters/javascript.json"
  ],
  "content_security_policy": "script-src 'self' 'unsafe-eval'; object-src 'self';",
  "permissions": [
    "<all_urls>",
    "bookmarks",
    "contextMenus",
    "downloads",
    "history",
    "menus",
    "notifications",
    "storage",
    "tabs",
    "webNavigation",
    "webRequest"
  ]
}