Examine source code of Bibliography Counselor

{
  "manifest_version": 3,
  "name": "Bibliography Counselor",
  "version": "1.0.1",
  "description": "A Bibliographic Citation Recommendation System integrated with Overleaf",
  "action": {
    "default_title": "Fetch Bibs"
  },
  "author": "D Dutta, D Pal, M Mitra",
  "icons": {
    "16": "/icons/16_2.png",
    "32": "/icons/32_2.png",
    "64": "/icons/64_2.png",
    "128": "/icons/128_2.png",
    "256": "/icons/256_2.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "bibliographycounselor@developandcraft.com"
    }
  },
  "host_permissions": [
    "https://overleaf.com/project/*",
    "https://www.overleaf.com/project/*",
    "*://*.overleaf.com/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "scripting",
    "contextMenus"
  ],
  "incognito": "spanning",
  "commands": {
    "_execute_action": {
      "suggested_key": {
        "default": "Ctrl+Alt+B",
        "linux": "Ctrl+Alt+B"
      },
      "description": "Send a 'toggle-feature' event"
    }
  }
}