Examine source code of Jira Assistant: Worklog, Sprint report, Timer, etc

{
  "manifest_version": 2,
  "name": "Jira Assistant: Worklog, Sprint report, etc",
  "short_name": "Jira Assist",
  "version": "2.62",
  "description": "Help to track & upload work done on a Jira Ticket on timely basis and generate Worklog, Sprint and other custom reports.",
  "icons": {
    "24": "/assets/icon_24.png",
    "32": "/assets/icon_32.png",
    "48": "/assets/icon_48.png"
  },
  "browser_action": {
    "default_icon": {
      "24": "/assets/icon_24.png",
      "32": "/assets/icon_32.png",
      "48": "/assets/icon_48.png"
    },
    "default_title": "Jira Assistant",
    "default_popup": "/menu.html"
  },
  "commands": {
    "open-ja-dashboard": {
      "suggested_key": {
        "default": "Alt+J",
        "mac": "Command+Shift+J"
      },
      "description": "Open JiraAssist dashboard page"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "https://*.jiraassistant.com/*",
        "http://local.jiraassistant.com/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_start"
    }
  ],
  "options_ui": {
    "page": "index.html#/options",
    "browser_style": true
  },
  "background": {
    "persistent": true,
    "scripts": [
      "/static/js/background.js"
    ]
  },
  "web_accessible_resources": [
    "api-pollyfill.js",
    "index.html",
    "/assets/*",
    "/static/js/jira_cs.js",
    "/static/css/jira_cs.css"
  ],
  "content_security_policy": "script-src 'self' ; object-src 'self';",
  "permissions": [
    "activeTab",
    "identity",
    "https://*.atlassian.net/",
    "storage",
    "idle",
    "scripting"
  ],
  "optional_permissions": [
    "tabs",
    "http://*/",
    "https://*/"
  ],
  "developer": {
    "name": "Shridhar TL",
    "url": "https://www.jiraassistant.com/"
  },
  "author": "Shridhar",
  "browser_specific_settings": {
    "gecko": {
      "id": "{e1f84eb4-d366-40ea-ac45-77e3ef5d2d5e}"
    }
  }
}