Examine source code of Ticket360

{
  "manifest_version": 2,
  "name": "Ticket360",
  "version": "1.7.0",
  "description": "360-degree view of Jira tickets: status and assignee history, and configurable fields within your browser.",
  "permissions": [
    "storage",
    "tabs",
    "menus",
    "contextMenus",
    "clipboardWrite",
    "https://*.atlassian.net/*",
    "https://*.jira.com/*"
  ],
  "background": {
    "scripts": [
      "src/shared/browser-polyfill.js",
      "src/background.js"
    ],
    "persistent": false
  },
  "browser_action": {
    "default_popup": "src/popup/popup.html",
    "default_title": "Ticket360"
  },
  "icons": {
    "16": "src/icons/icon16.png",
    "19": "src/icons/icon19.png",
    "24": "src/icons/icon24.png",
    "32": "src/icons/icon32.png",
    "38": "src/icons/icon38.png",
    "48": "src/icons/icon48.png",
    "64": "src/icons/icon64.png",
    "96": "src/icons/icon96.png",
    "128": "src/icons/icon128.png",
    "256": "src/icons/icon256.png",
    "512": "src/icons/icon512.png"
  },
  "options_ui": {
    "page": "src/options/options.html",
    "open_in_tab": true
  },
  "content_scripts": [
    {
      "matches": [
        "https://*.atlassian.net/*",
        "https://*.jira.com/*"
      ],
      "js": [
        "src/shared/browser-polyfill.js",
        "src/content/content.js"
      ]
    }
  ],
  "web_accessible_resources": [
    "src/icons/*.png",
    "src/tour.json"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "ticket360@yourcompany.com",
      "strict_min_version": "109.0"
    }
  }
}