Examine source code of Scroll To Top

{
  "manifest_version": 2,
  "name": "Scroll To Top",
  "version": "1.0",
  "description": "Quickly scroll back to the top of any webpage with one click.",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": {
      "48": "icons/icon.png"
    },
    "default_title": "Scroll To Top"
  },
  "permissions": [
    "activeTab"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{a6aa2811-bd1c-44be-92d6-8b1fd873b302}"
    }
  }
}