Examine source code of 100Results

{
  "manifest_version": 2,
  "name": "100Results",
  "version": "1.0",
  "description": "Automatically appends &num=100 to Google searches to display 100 results per page.",
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png"
  },
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "<all_urls>",
    "tabs"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{4b164324-64ce-46b8-8c22-fec3fc1b3566}"
    }
  }
}