Examine source code of Simple Snip Pinboard

{
  "manifest_version": 2,
  "name": "Simple Snip Pinboard",
  "version": "7.7",
  "description": "Snip parts of a page and pin them locally.",
  "icons": {
    "16": "icon.png",
    "32": "icon.png",
    "48": "icon.png",
    "64": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "simple-snip-pinboard@example.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "activeTab",
    "tabs",
    "storage"
  ],
  "background": {
    "page": "background.html"
  },
  "browser_action": {
    "default_title": "Pinboard",
    "default_popup": "pinboard.html",
    "default_icon": {
      "16": "icon.png",
      "32": "icon.png",
      "48": "icon.png",
      "64": "icon.png"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content-script.js"
      ],
      "run_at": "document_idle"
    }
  ]
}