Examine source code of Editing Era Focus Guard

{
  "manifest_version": 2,
  "name": "Editing Era Focus Guard",
  "version": "1.0",
  "description": "Bloque les sites de divertissement pendant les sessions Pomodoro",
  "permissions": [
    "storage",
    "tabs",
    "webRequest",
    "webRequestBlocking",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": "icon48.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://editing-era.com/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "icons": {
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "web_accessible_resources": [
    "blocked.html"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "focusguard@editing-era.com",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}