Examine source code of ScrapeMate Beta

{
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "web_accessible_resources": [
    "sidebar.html",
    "content.css",
    "vendor/selectorgadget_combined.css"
  ],
  "browser_action": {
    "default_icon": {
      "16": "icons/16.png",
      "24": "icons/24.png",
      "32": "icons/32.png",
      "48": "icons/48.png",
      "64": "icons/64.png",
      "128": "icons/128.png"
    },
    "default_title": "ScrapeMate Beta"
  },
  "name": "ScrapeMate Beta",
  "description": "Scraping assistant tool. Editing and maintaining CSS/XPath selectors across webpages.",
  "homepage_url": "https://github.com/Unknowny/ScrapeMate#readme",
  "icons": {
    "16": "icons/16.png",
    "24": "icons/24.png",
    "32": "icons/32.png",
    "48": "icons/48.png",
    "64": "icons/64.png",
    "128": "icons/128.png"
  },
  "permissions": [
    "tabs",
    "activeTab",
    "<all_urls>",
    "storage",
    "webRequest",
    "webRequestBlocking"
  ],
  "version": "0.1.2resigned1",
  "applications": {
    "gecko": {
      "id": "me.myself.and.irene@fellow.com"
    }
  },
  "manifest_version": 2
}