Examine source code of SplitScale

{
  "manifest_version": 2,
  "name": "SplitScale",
  "version": "1.1",
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "storage",
    "activeTab",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_title": "SplitScale",
    "default_icon": {
      "16": "icons/icon16.png",
      "32": "icons/icon32.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "options_page": "settings.html",
  "browser_specific_settings": {
    "gecko": {
      "id": "{15aebb03-be69-47c3-93f0-80a0876fa823}"
    }
  }
}