Examine source code of Salasana

{
  "manifest_version": 2,
  "name": "Salasana",
  "version": "1.0",
  "description": "Password keeper and generator",
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_end"
    }
  ],
  "background": {
    "scripts": [
      "test.js"
    ]
  },
  "web_accessible_resources": [
    "pages/at_start.html"
  ],
  "permissions": [
    "tabs",
    "storage",
    "http://*/*",
    "https://*/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{52b32d17-0f89-44bc-a045-c8e067a35a4c}"
    }
  }
}