Examine source code of primalDraw

{
  "manifest_version": 2,
  "name": "primalDraw",
  "description": "Free online vector graphics drawing application.",
  "version": "1.21resigned1",
  "icons": {
    "128": "icon.svg"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": {
      "128": "icon.svg"
    },
    "default_title": "primalDraw"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{d37413e1-adeb-41bd-a310-99342fb21f80}"
    }
  }
}