Examine source code of SCRAPE

{
  "manifest_version": 2,
  "name": "SCRAPE",
  "version": "1.0",
  "description": "Capture screenshots",
  "permissions": [
    "activeTab",
    "notifications",
    "tabs"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "content_security_policy": "script-src 'self'; object-src 'self';",
  "browser_action": {
    "default_icon": {
      "128": "icon128.png"
    }
  },
  "commands": {
    "run-foo": {
      "suggested_key": {
        "default": "Ctrl+Shift+Period",
        "mac": "Command+Shift+Period"
      },
      "description": "Run \"foo\" on the current page."
    },
    "_execute_action": {
      "suggested_key": {
        "windows": "Ctrl+Shift+X",
        "mac": "Command+Shift+X",
        "chromeos": "Ctrl+Shift+U",
        "linux": "Ctrl+Shift+J"
      }
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{8d901a16-1d13-4165-9934-6bee8ff9770a}"
    }
  }
}