Examine source code of Plan 9 from outer space

{
  "name": "Plan9 from outer space",
  "author": "vintageradioclassics",
  "version": "0.1",
  "manifest_version": 2,
  "description": "Watch the great Sci-fi Classic Plan9",
  "browser_action": {
    "default_icon": "plan9.png",
    "default_title": "Watch the great Sci-fi Classic Plan9",
    "default_popup": "extension.html"
  },
  "icons": {
    "128": "plan9.png"
  }
}