Examine source code of Notesheet

{
  "manifest_version": 2,
  "name": "__MSG_appname__",
  "short_name": "__MSG_shortname__",
  "default_locale": "en",
  "version": "5.0.1",
  "description": "__MSG_description__",
  "minimum_chrome_version": "52",
  "background": {
    "page": "background.html",
    "persistent": false
  },
  "browser_action": {
    "default_icon": {
      "16": "notesheet-16.png",
      "32": "notesheet-32.png",
      "48": "notesheet-48.png",
      "64": "notesheet-64.png"
    },
    "default_popup": "popup.html",
    "default_title": "NoteSheet"
  },
  "permissions": [
    "http://*/",
    "https://*/",
    "activeTab",
    "tabs",
    "storage",
    "identity",
    "contextMenus"
  ],
  "icons": {
    "16": "notesheet-16.png",
    "48": "notesheet-logo-48.png",
    "128": "notesheet-logo-128.png"
  },
  "web_accessible_resources": [
    "extension.css"
  ],
  "content_scripts": [
    {
      "all_frames": true,
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "css": [
        "extension.css"
      ],
      "js": [
        "content_script.js"
      ]
    },
    {
      "all_frames": true,
      "matches": [
        "https://editoy.com/oauth2callback*"
      ],
      "js": [
        "fallback-auth.js"
      ],
      "run_at": "document_end"
    }
  ]
}