Penguinium

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "Penguinium",
  "version": "0.0.1",
  "manifest_version": 2,
  "description": "Drive your chrome tab to penquinium mode where all page content will become black and white.",
  "icons": {
    "16": "icons/16x16.png",
    "48": "icons/48x48.png",
    "128": "icons/128x128.png"
  },
  "omnibox": {
    "keyword": "Penguinium"
  },
  "browser_action": {
    "default_icon": {
      "19": "icons/19x19.png",
      "38": "icons/38x38.png"
    },
    "default_title": "Penguinium",
    "default_popup": "browseraction/popup.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>",
        "*://*/*.*",
        "file:///*/*.*"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "permissions": [
    "tabs",
    "<all_urls>",
    "*://*/*.*",
    "storage"
  ]
}