Examine source code of Apricott

{
  "manifest_version": 2,
  "name": "Apricott",
  "version": "0.1.2",
  "description": "Provides additional keyboard shortcuts for navigation",
  "icons": {
    "48": "icons/apricott-48.png"
  },
  "browser_action": {
    "default_icon": {
      "48": "icons/apricott-48.png"
    },
    "default_title": "Apricott"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "apricott.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "options_ui": {
    "page": "options.html"
  },
  "permissions": [
    "storage",
    "tabs"
  ],
  "applications": {
    "gecko": {
      "id": "apricott@t3y.eu"
    }
  }
}