Dummy request blocker Firefox

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manifest.json
{
  "name": "WebRequest Blocker",
  "version": "1.0",
  "description": "Uses the WebRequest API to block all cross-site requests",
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "<all_urls>"
  ],
  "manifest_version": 2
}

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