Examine source code of Google Scholar Button

{
  "manifest_version": 2,
  "name": "__MSG_853__",
  "default_locale": "en",
  "description": "__MSG_854__",
  "homepage_url": "https://scholar.google.com/?hl=__MSG_@@ui_locale__&oi=gsb",
  "icons": {
    "48": "scholar48.png",
    "96": "scholar96.png"
  },
  "version": "3.1",
  "applications": {
    "gecko": {
      "id": "button@scholar.google.com",
      "strict_min_version": "55.0"
    }
  },
  "permissions": [
    "activeTab",
    "storage",
    "tabs",
    "*://scholar.google.com/"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://scholar.google.com/*"
      ],
      "include_globs": [
        "*/scholar_gsb_promo*"
      ],
      "css": [
        "disable_promo.css"
      ],
      "all_frames": true
    },
    {
      "matches": [
        "*://scholar.google.com/*"
      ],
      "js": [
        "authuserscript-compiled.js"
      ]
    }
  ],
  "browser_action": {
    "browser_style": false,
    "default_icon": {
      "16": "scholar16-tb.png",
      "32": "scholar32-tb.png",
      "64": "scholar64-tb.png"
    },
    "default_title": "__MSG_853__",
    "default_popup": "popup.html"
  }
}