Examine source code of Recally Clipper

{
  "manifest_version": 2,
  "name": "Recally Clipper",
  "description": "Clip web content to Recally",
  "version": "0.0.4",
  "icons": {
    "16": "icons/16.png",
    "32": "icons/32.png",
    "48": "icons/48.png",
    "128": "icons/128.png"
  },
  "permissions": [
    "storage",
    "activeTab",
    "tabs",
    "scripting",
    "contextMenus",
    "notifications",
    "https://*/*",
    "http://*/*"
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_title": "Recally Clipper"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "options_ui": {
    "open_in_tab": true,
    "page": "options.html"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content-scripts/content.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{874c94a9-7070-4ff4-93a3-1b2d9c04f34f}"
    }
  }
}