Examine source code of HeaderSmith – cod3rjava

{
  "manifest_version": 2,
  "name": "HeaderSmith – cod3rjava",
  "version": "0.1.3",
  "description": "Override request headers in Firefox.",
  "browser_specific_settings": {
    "gecko": {
      "id": "headersmith-cod3rjava@cod3rjava.local",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "applications": {
    "gecko": {
      "id": "headersmith-cod3rjava@cod3rjava.local",
      "strict_min_version": "109.0"
    }
  },
  "permissions": [
    "storage",
    "webRequest",
    "webRequestBlocking",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background/background.js"
    ]
  },
  "browser_action": {
    "default_title": "HeaderSmith – cod3rjava",
    "default_popup": "popup/popup.html"
  },
  "icons": {
    "48": "icons/icon.svg",
    "96": "icons/icon.svg"
  }
}