Examine source code of UpSignOn by Septeo

{
  "manifest_version": 2,
  "version": "1.7.9",
  "name": "UpSignOn by Septeo",
  "default_locale": "en",
  "description": "__MSG_description__",
  "icons": {
    "256": "./u-icon.png"
  },
  "background": {
    "scripts": [
      "dist/backgroundScript.js"
    ]
  },
  "browser_action": {
    "default_popup": "statics/popup/popup.html"
  },
  "content_scripts": [
    {
      "js": [
        "dist/contentScript.js"
      ],
      "matches": [
        "https://*/*",
        "http://*/*"
      ],
      "all_frames": true
    }
  ],
  "permissions": [
    "storage",
    "https://*/*",
    "http://*/*",
    "tabs",
    "activeTab",
    "webNavigation"
  ],
  "web_accessible_resources": [
    "*.map",
    "u-icon.png",
    "statics/contentScript/content-popup.css"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "upsignon@upsignon.eu"
    }
  }
}