Content Background Color

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "version": "0.0.1",
  "name": "Content Background Color",
  "description": "Change Content Background Color",
  "permissions": [
    "storage"
  ],
  "browser_action": {
    "default_icon": {
      "16": "favicon-16x16.png",
      "32": "favicon-32x32.png",
      "48": "favicon-48x48.png",
      "128": "favicon-128x128.png"
    },
    "default_title": "title",
    "default_popup": "popup.html"
  },
  "icons": {
    "16": "favicon-16x16.png",
    "32": "favicon-32x32.png",
    "48": "favicon-48x48.png",
    "128": "favicon-128x128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ]
    }
  ]
}