Examine source code of Unblock Paste

{
  "manifest_version": 2,
  "name": "Unblock Paste",
  "description": "Unblock pasting.",
  "version": "1.2",
  "permissions": [
    "activeTab",
    "scripting"
  ],
  "author": "Naitik Shah <n@daaku.org>",
  "homepage_url": "https://github.com/daaku/unblock-paste",
  "background": {
    "scripts": [
      "bg.js"
    ]
  },
  "browser_action": {
    "default_icon": "icon.svg",
    "default_title": "Unblock Paste"
  },
  "icons": {
    "48": "icon.svg",
    "128": "icon.svg"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "unblock-paste@daaku.org"
    }
  }
}