Examine source code of Ad-bricoBlocker

{
  "manifest_version": 2,
  "name": "Ad-bricoBlocker",
  "version": "3.0",
  "description": "Block ads and pop-ups",
  "icons": {
    "48": "icons/abricot.png"
  },
  "content_scripts": [
    {
      "run_at": "document_start",
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "main_blocker.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "strict_min_version": "65.0",
      "id": "{8acf3ae4-6bb4-4cae-99b1-5da239e434ea}"
    }
  }
}