Examine source code of Privacy Blocker

{
  "manifest_version": 2,
  "name": "Privacy Blocker",
  "version": "1.0",
  "description": "Block passive tracking to protect your privacy.",
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "*://*/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "icons": {
    "48": "icon.png"
  },
  "browser_action": {
    "default_icon": "icon.png",
    "default_title": "Privacy Blocker"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{be0a2207-a854-489f-8130-0f5747eb4a8d}"
    }
  }
}