Examine source code of Fire Source Viewer

{
  "name": "Fire Source Viewer",
  "short_name": "source view",
  "version": "1.4.3",
  "description": "Your rapid source code viewer",
  "permissions": [
    "<all_urls>",
    "clipboardWrite"
  ],
  "manifest_version": 2,
  "browser_action": {
    "default_icon": "icons/gear19.png"
  },
  "icons": {
    "16": "icons/gear19.png",
    "128": "icons/gear128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "load.js"
      ],
      "run_at": "document_end"
    }
  ],
  "options_ui": {
    "page": "options.html",
    "browser_style": false,
    "open_in_tab": false
  },
  "applications": {
    "gecko": {
      "id": "@firesource",
      "strict_min_version": "57.0"
    }
  },
  "background": {
    "scripts": [
      "js/config.js",
      "bg.js"
    ]
  }
}