Examine source code of Move to Bugzilla.

{
  "manifest_version": 2,
  "name": "Move to Bugzilla.",
  "version": "1.0.10",
  "icons": {
    "48": "icons/exchange.svg",
    "96": "icons/exchange.svg"
  },
  "options_ui": {
    "page": "options.html"
  },
  "content_scripts": [
    {
      "matches": [
        "https://github.com/*"
      ],
      "run_at": "document_idle",
      "js": [
        "button.js",
        "add-button.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "page_action": {
    "browser_style": true,
    "default_icon": "icons/exchange.svg",
    "default_title": "Move To Bugzilla",
    "default_popup": "move.html",
    "show_matches": [
      "https://github.com/*/issues/*"
    ],
    "hide_matches": [
      "https://github.com/*/issues"
    ]
  },
  "permissions": [
    "storage",
    "activeTab"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "move-to-bugzilla@sferro.dev"
    }
  }
}