Examine source code of SMMRY extension

{
  "manifest_version": 2,
  "name": "SMMRY-plugin",
  "version": "0.1.0",
  "description": "Alternative to the bookmark shortcut provided by SMMRY.com",
  "icons": {
    "48": "icons/logo-48.png",
    "96": "icons/logo-96.png"
  },
  "permissions": [
    "tabs",
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.smmry.com/*"
      ],
      "js": [
        "styler.js"
      ]
    }
  ],
  "browser_action": {
    "default_icon": {
      "16": "icons/logo-16.png",
      "32": "icons/logo-32.png"
    }
  },
  "options_ui": {
    "page": "options.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "smmry@ture.dev"
    }
  }
}