Examine source code of Blackboard Notify

{
  "manifest_version": 2,
  "name": "Blackboard Notify",
  "version": "0.2.1",
  "description": "Performs an action when Blackboard Collaborate Ultra events are detected",
  "homepage_url": "https://github.com/jmann240/blackboard-notify",
  "icons": {
    "32": "icons/icon.svg",
    "48": "icons/icon.svg",
    "96": "icons/icon.svg"
  },
  "permissions": [
    "activeTab",
    "storage",
    "<all_urls>"
  ],
  "browser_action": {
    "default_icon": "icons/icon.svg",
    "default_title": "Notify Settings",
    "default_popup": "popup/settings.html"
  },
  "content_scripts": [
    {
      "matches": [
        "https://us.bbcollab.com/*"
      ],
      "js": [
        "content_scripts/notify.js"
      ]
    }
  ]
}