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manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "Outline All Elements",
  "version": "1.0",
  "description": "Add CSS Outline property to all elements on the page for debugging CSS Layout.",
  "manifest_version": 2,
  "background": {
    "persistent": true,
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "activeTab"
  ],
  "browser_action": {
    "default_icon": {
      "16": "icon_16.png",
      "32": "icon_32.png",
      "48": "icon_48.png",
      "128": "icon_128.png"
    }
  },
  "icons": {
    "16": "icon_16.png",
    "32": "icon_32.png",
    "48": "icon_48.png",
    "128": "icon_128.png"
  }
}