Examine source code of Jira History Diff

{
  "manifest_version": 3,
  "name": "Jira History Diff",
  "version": "1.0.0",
  "description": "Side-by-side word-level diff for Jira issue history (Description & Summary)",
  "browser_specific_settings": {
    "gecko": {
      "id": "jira-history-diff@example.com",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "storage",
    "activeTab"
  ],
  "host_permissions": [
    "*://*.atlassian.net/*",
    "*://*/*"
  ],
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "action": {
    "default_popup": "popup.html",
    "default_title": "Jira History Diff",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.atlassian.net/*",
        "*://*/*"
      ],
      "js": [
        "diff-match-patch.js",
        "content.js"
      ],
      "css": [
        "styles.css"
      ],
      "run_at": "document_idle"
    }
  ]
}