Examine source code of Bookmark Placer

{
  "author": "igorlogius",
  "browser_action": {},
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "commands": {
    "_execute_browser_action": {
      "suggested_key": {
        "default": "Ctrl+Alt+B"
      }
    }
  },
  "description": "Place bookmarks into specific folders based on url regex matches",
  "icons": {
    "128": "icon.png"
  },
  "manifest_version": 2,
  "name": "Bookmark Placer",
  "options_ui": {
    "page": "options.html"
  },
  "permissions": [
    "tabs",
    "menus",
    "storage",
    "bookmarks",
    "clipboardWrite"
  ],
  "version": "1.3.5",
  "browser_specific_settings": {
    "gecko": {
      "id": "{5f3f4038-d6a8-4223-a1d7-06a06cbb96d7}"
    }
  }
}