Examine source code of MPC Capture

{
  "manifest_version": 2,
  "name": "MPC Capture",
  "description": "Capturez l'offre de la page que vous lisez dans MPC, en un clic.",
  "version": "0.1.2",
  "icons": {
    "16": "icon/16.png",
    "32": "icon/32.png",
    "48": "icon/48.png",
    "128": "icon/128.png"
  },
  "permissions": [
    "activeTab",
    "notifications",
    "storage",
    "contextMenus",
    "https://mpc.alfredmouelle.com/*",
    "http://localhost:3000/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "mpc-capture@alfredmouelle.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "120.0"
    }
  },
  "web_accessible_resources": [
    "fonts/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "http://localhost/app/pairing",
        "https://mpc.alfredmouelle.com/app/pairing"
      ],
      "js": [
        "content-scripts/pairing.js"
      ]
    }
  ],
  "browser_action": {
    "default_title": "Capturer cette offre dans MPC"
  }
}