Examine source code of Anti-Grabber

{
  "name": "Anti-Grabber",
  "version": "1.1",
  "manifest_version": 2,
  "description": "Blocks dangerous links from Grabify and 50+ other IP grabber & scam links.",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "applications": {
    "gecko": {
      "strict_min_version": "57.0a1",
      "id": "{f4b7ac22-e010-47fa-8f80-60e83ce0df49}"
    }
  },
  "icons": {},
  "browser_action": {
    "default_icon": "iconkep.png",
    "default_title": "Anti-Grabber",
    "default_popup": "popup.html"
  },
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "<all_urls>"
  ]
}