Examine source code of jira-comment-fixer

{
  "manifest_version": 2,
  "name": "jira-comment-fixer",
  "version": "1.2",
  "description": "Auto-switch Jira comments to 'Oldest first' on Jira Cloud and Jira Server/Data Center.",
  "permissions": [
    "storage",
    "tabs"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{2fd03cae-8a5e-436a-8bae-96a73a388d37}"
    }
  }
}