Examine source code of Zoeker

{
  "name": "Zoeker",
  "version": "1.0",
  "manifest_version": 2,
  "description": "Zoeker Extension!",
  "icons": {
    "16": "/assets/image/logo_16.png",
    "32": "/assets/image/logo_32.png",
    "48": "/assets/image/logo_48.png",
    "128": "/assets/image/logo_128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*/*"
      ],
      "js": [
        "/module/background.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "/module/background.js"
    ]
  },
  "homepage_url": "https://zoeker.yilstaging.com",
  "permissions": [
    "storage",
    "activeTab"
  ],
  "browser_action": {
    "default_title": "Zoeker",
    "default_popup": "index.html",
    "default_icon": "/assets/image/logo_32.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "storage@zoeker.com"
    }
  }
}