Examine source code of LibreTranslateClient

{
  "manifest_version": 2,
  "name": "LibreTranslateClient",
  "author": "Filippo Dibenedetto",
  "version": "1.3.1",
  "description": "Translate selected text with LibreTranslate",
  "browser_specific_settings": {
    "gecko": {
      "id": "libretranslateclient@dib21.it"
    }
  },
  "icons": {
    "48": "icon.svg",
    "96": "icon.svg"
  },
  "permissions": [
    "<all_urls>",
    "storage",
    "contextMenus",
    "activeTab"
  ],
  "background": {
    "scripts": [
      "global.js",
      "encryption.js",
      "background.js"
    ]
  },
  "options_ui": {
    "page": "options.html"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "onSelection.js"
      ]
    }
  ]
}