Examine source code of bibtexify

{
  "manifest_version": 2,
  "name": "bibtexify",
  "version": "1.1",
  "description": "Adds a button to copy bibtex of arXiv abstract or pdf webpage",
  "page_action": {
    "show_matches": [
      "*://*.arxiv.org/*"
    ],
    "browser_style": true,
    "default_icon": "clipboard-plus.svg",
    "default_title": "bibtexify"
  },
  "permissions": [
    "activeTab",
    "clipboardWrite",
    "notifications"
  ],
  "background": {
    "scripts": [
      "bibtexify.js"
    ]
  }
}