Examine source code of Nexus Now!

{
  "manifest_version": 3,
  "name": "Nexus Now!",
  "short_name": "nexus-now",
  "version": "0.1.0",
  "author": "Antony Kellermann",
  "homepage_url": "https://github.com/aokellermann/nexus-now",
  "description": "Access scientific literature using nexus.",
  "icons": {
    "48": "icons/48x48-hybrid.png",
    "96": "icons/96x96-hybrid.png"
  },
  "action": {
    "browser_style": true,
    "default_icon": {
      "48": "icons/48x48-hybrid.png",
      "96": "icons/96x96-hybrid.png",
      "128": "icons/128x128-hybrid.png"
    },
    "default_title": "Nexus Now!",
    "theme_icons": [
      {
        "light": "icons/48x48-dark.png",
        "dark": "icons/48x48-light.png",
        "size": 48
      },
      {
        "light": "icons/96x96-dark.png",
        "dark": "icons/96x96-light.png",
        "size": 96
      }
    ]
  },
  "permissions": [
    "activeTab",
    "contextMenus",
    "scripting"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{2ba6d294-d94a-4d52-97da-f20591128801}"
    }
  }
}