Examine source code of OWA notifications

{
  "manifest_version": 2,
  "name": "OWA notifications",
  "version": "1.8.0",
  "author": "Phil Tsaryk",
  "description": "Add support for desktop notifications in Outlook Web Access application.",
  "homepage_url": "https://github.com/phts/firefox-owa-notifications",
  "icons": {
    "32": "icons/app-32.png"
  },
  "permissions": [
    "tabs"
  ],
  "applications": {
    "gecko": {
      "id": "owa-notifications@phts",
      "strict_min_version": "55.0"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "https://*/owa/*",
        "https://outlook.office.com/mail/*",
        "https://outlook.office365.com/mail/*",
        "https://outlook.office365.us/mail/*"
      ],
      "js": [
        "index.js"
      ]
    }
  ],
  "browser_action": {
    "browser_style": true,
    "default_icon": "icons/button-32.png",
    "default_title": "OWA notifications: on/off"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  }
}