Examine source code of HLClock

{
  "manifest_version": 3,
  "name": "HLClock",
  "description": "Integrate Zendesk, Clockify and Hurricane Labs APIs for easier time tracking.",
  "version": "1.6.3",
  "icons": {
    "16": "icons/hlclock_logo_16.png",
    "48": "icons/hlclock_logo_48.png",
    "128": "icons/hlclock_logo_128.png"
  },
  "background": {
    "page": "background_page.html"
  },
  "permissions": [
    "notifications",
    "scripting",
    "storage"
  ],
  "host_permissions": [
    "https://hurricanelabs.zendesk.com/*",
    "https://portal.hurricanelabs.com/*",
    "https://hurricanelabs-sandbox.app.opsgenie.com/*",
    "https://hurricanelabs.app.opsgenie.com/*",
    "https://api.clickup.com/*"
  ],
  "action": {
    "default_popup": "ui/popup.html",
    "default_title": "HLClock Options"
  },
  "content_scripts": [
    {
      "js": [
        "content_zendesk.js"
      ],
      "matches": [
        "https://hurricanelabs.zendesk.com/*"
      ]
    },
    {
      "js": [
        "content_hlportal.js"
      ],
      "matches": [
        "https://portal.hurricanelabs.com/*"
      ]
    },
    {
      "js": [
        "content_opsgenie.js"
      ],
      "matches": [
        "https://hurricanelabs-sandbox.app.opsgenie.com/alert/list",
        "https://hurricanelabs-sandbox.app.opsgenie.com/alert/detail/*",
        "https://hurricanelabs.app.opsgenie.com/alert/list",
        "https://hurricanelabs.app.opsgenie.com/alert/detail/*"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "hlclock@hurricanelabs.com",
      "data_collection_permissions": {
        "required": [
          "authenticationInfo",
          "browsingActivity"
        ],
        "optional": [
          "technicalAndInteraction"
        ]
      }
    }
  }
}