Examine source code of bascevir

{
  "manifest_version": 2,
  "name": "bascevir",
  "version": "1.4",
  "description": "Get the meaning of words that you don't know when reading. It will help you stay on the page.",
  "icons": {
    "64": "icons/64.png",
    "128": "icons/128.png",
    "256": "icons/256.png",
    "512": "icons/512.png"
  },
  "background": {
    "scripts": [
      "contextMenus.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "bascevir.js",
        "svg.min.js"
      ]
    }
  ],
  "permissions": [
    "webRequest",
    "<all_urls>",
    "storage",
    "activeTab",
    "contextMenus"
  ],
  "applications": {
    "gecko": {
      "id": "{27931dcf-51ad-4fc4-9824-654e97b4d464}"
    }
  }
}