Examine source code of SnipThat.io

{
  "manifest_version": 2,
  "name": "SnipThat.io",
  "description": "Save interesting snippets that you find on the web",
  "version": "1.0.3",
  "homepage_url": "https://snipthat.io",
  "icons": {
    "48": "icons/clipboard-48.png"
  },
  "background": {
    "scripts": [
      "browser-polyfill.js",
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": "icons/clipboard-48.png",
    "default_title": "Snipthat",
    "default_popup": "popup/popup.html"
  },
  "permissions": [
    "contextMenus",
    "activeTab",
    "tabs",
    "storage",
    "<all_urls>"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{6b2d5b0c-4d5d-4c15-bd87-db7257fbdd90}"
    }
  }
}