Android new tabs in foreground

manifest.json

{
  "manifest_version": 2,
  "name": "Android new tabs in foreground",
  "description": "Opens new tabs in foreground.",
  "version": "1.0.1",
  "author": "DaveRo",
  "applications": {
    "gecko": {
      "id": "[email protected]"
    }
  },
  "browser_specific_settings": {
    "gecko_android": {},
    "gecko": {
      "id": "[email protected]"
    }
  },
  "background": {
    "scripts": [
      "tabs_foreground.js"
    ]
  },
  "permissions": [
    "tabs"
  ]
}