RevealIt

manifest.json

{
  "update_url": "http://clients2.google.com/service/update2/crx",
  "name": "RevealIt",
  "version": "1.4",
  "manifest_version": 2,
  "description": "Visual Cue to identify your Salesforce.com instance.",
  "icons": {
    "16": "revealIt-16.png",
    "48": "revealIt-48.png",
    "128": "revealIt-128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://salesforce.com/*",
        "https://*.salesforce.com/*",
        "https://*.visual.force.com/*"
      ],
      "js": [
        "contentscript.js"
      ]
    }
  ],
  "permissions": [
    "tabs"
  ],
  "browser_action": {
    "default_icon": "revealIt-22.png",
    "default_title": "Discover your cloud"
  }
}