Salesforce Background Control

Case background control
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manifest.json
{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "name": "Salesforce Background Control",
  "description": "Case background control",
  "version": "1.0.1",
  "icons": {
    "128": "alexa.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "tabs",
    "*://*.salesforce.com/",
    "*://*.force.com/",
    "webRequest",
    "*://*.salesforce.com/",
    "*://*.force.com/",
    "webRequestBlocking",
    "*://*.salesforce.com/",
    "*://*.force.com/"
  ],
  "page_action": {
    "default_name": "SBC",
    "default_icon": "alexa.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://*.force.com/*"
      ],
      "js": [
        "inject.js"
      ]
    }
  ]
}