Examine source code of EasyTime for JIRA

{
  "browser_specific_settings": {
    "gecko": {
      "id": "{0192def6-e870-70ab-a153-5912ee11f2eb}"
    }
  },
  "name": "EasyTime for JIRA",
  "version": "0.0.0.8",
  "description": "Extension to track worklogs in Jira",
  "manifest_version": 3,
  "icons": {
    "16": "assets/ext_icon16.png",
    "18": "assets/ext_icon18.png",
    "24": "assets/ext_icon24.png",
    "32": "assets/ext_icon32.png",
    "48": "assets/ext_icon48.png",
    "64": "assets/ext_icon64.png",
    "128": "assets/ext_icon128.png"
  },
  "action": {
    "default_icon": {
      "16": "assets/ext_icon16.png",
      "18": "assets/ext_icon18.png",
      "24": "assets/ext_icon24.png",
      "32": "assets/ext_icon32.png",
      "48": "assets/ext_icon48.png",
      "64": "assets/ext_icon64.png"
    },
    "default_title": "EasyTime for Jira",
    "default_popup": "index.html"
  },
  "permissions": [
    "storage"
  ],
  "host_permissions": [
    "*://*.atlassian.net/*"
  ]
}