Examine source code of Paste Pro

{
  "manifest_version": 2,
  "name": "Paste Pro",
  "version": "1.5",
  "description": "Shows the last 10 items copied to the clipboard in the context menu",
  "permissions": [
    "contextMenus",
    "clipboardRead",
    "clipboardWrite",
    "<all_urls>",
    "tabs"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content_script.js"
      ]
    }
  ],
  "icons": {
    "48": "icon48.png",
    "96": "icon96.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{f81c43d3-389d-4f83-a172-fd8f3a62080c}"
    }
  }
}