manifest.json~

{
  "name": "What is",
  "version": "0.0.1",
  "manifest_version": 2,
  "description" : "Description ...",
  "icons": { "16": "icons/16x16.png", "48": "icons/48x48.png", "128": "icons/128x128.png" },


  "browser_action": {
    "default_icon": {
      "19": "icons/19x19.png",
      "38": "icons/38x38.png"
    },
    "default_title": "That's the tool tip",
    "default_popup": "browseraction/popup.html"
  },

  "background": {
    "scripts": ["background.js"],
    "persistent": false
  },
	"permissions": [
		"activeTab"	,
		"tabs"
	],
	
	"commands": {
          "toggle-feature-foo": {
            "suggested_key": {
              "default": "Ctrl+Shift+Y",
              "mac": "Command+Shift+Y"
            },
            "description": "Toggle feature foo"
          }
   },
  "content_scripts": [
    {
      "matches": ["http://*/*", "https://*/*"],
      "js": ["content.js"]
    }
  ]

  
}