Examine source code of MetaVoter

{
  "manifest_version": 2,
  "name": "MetaVoter",
  "version": "1.8.3resigned1",
  "description": "Upvotes all posts on the page",
  "icons": {
    "48": "icons/icon-48.png"
  },
  "permissions": [
    "tabs",
    "activeTab",
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png",
      "64": "icons/icon-64.png"
    },
    "default_title": "MetaVote?"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.reddit.com/*"
      ]
    }
  ],
  "options_ui": {
    "page": "options.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{bce02246-0719-41c5-8fc7-6279875afca3}"
    }
  }
}