manifest.json

{
  "manifest_version": 2,
  "name": "mask me",
  "description": "This mask extension",
  "version": "1.0",
  "icons": {
    "16": "foto/icon_24.png",
    "48": "foto/icon_48.png"
  },
  "browser_action": {
    "default_icon": "foto/icon_32.png",
    "default_popup": "popup.html",
    "default_title": "give me mask"
  },
  "background": {
    "page": "background.html",
    "persistent": false
  },
  "omnibox": { "keyword" : "mask" },
  "permissions": [
        "tabs",
        "activeTab",
        "topSites",
        "http://*/*",
        "https://*/*"
  ]
}