Examine source code of Jira Persian improver

{
  "manifest_version": 3,
  "name": "Jira Persian improver",
  "version": "2.3.18.2",
  "description": "تجربه بهتر جیرا و کانفلوئنس برای پارسی زبـانان جهان",
  "author": "Amirali Eshghi",
  "action": {
    "default_popup": "popup.html",
    "default_icon": "images/icon-48.png"
  },
  "icons": {
    "48": "images/icon-48.png",
    "128": "images/icon-128.png"
  },
  "permissions": [
    "storage",
    "tabs"
  ],
  "background": {
    "page": "background.html"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js",
        "jalalidatepicker.js"
      ],
      "css": [
        "jalalidatepicker.css"
      ]
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "fonts/*",
        "jalalidatepicker.js",
        "jalalidatepicker.css",
        "images/plugin-banner.png"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{f6b8713b-6100-47bc-a5f9-0a49ca81cd55}"
    }
  },
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'none';"
  },
  "options_ui": {
    "page": "main.html",
    "open_in_tab": true
  }
}