Examine source code of MultiClip

{
  "manifest_version": 2,
  "name": "MultiClip",
  "version": "1.3resigned1",
  "description": "Enables the user to easily copy text to their clipboard",
  "icons": {
    "48": "icons/clip-48.png",
    "96": "icons/clip-96.png"
  },
  "sidebar_action": {
    "default_icon": "icons/clip-48.png",
    "default_title": "MultiClip",
    "default_panel": "sidebar/panel.html"
  },
  "commands": {
    "_execute_sidebar_action": {
      "suggested_key": {
        "default": "Ctrl+Shift+Y"
      }
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{5705515a-89d7-4512-a4c5-fc10bc125140}"
    }
  }
}