Examine source code of Fabric web clipper

{
  "manifest_version": 2,
  "name": "Fabric web clipper",
  "description": "🍱 All your stuff in one place. 👋 Collaborate on anything.",
  "version": "2.0.20",
  "icons": {
    "16": "icon-16.png",
    "32": "icon-32.png",
    "48": "icon-48.png",
    "96": "icon-96.png",
    "128": "icon-128.png"
  },
  "permissions": [
    "storage",
    "contextMenus",
    "scripting",
    "activeTab",
    "tabs"
  ],
  "host_permissions": [
    "*://*/*",
    "<all_urls>"
  ],
  "externally_connectable": {
    "matches": [
      "https://fabric.so/*",
      "https://*.fabric.so/*",
      "https://*.projectsimba.live/*",
      "http://localhost:3000/*"
    ]
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "Fabric",
    "default_popup": "popup.html"
  },
  "content_scripts": [],
  "browser_specific_settings": {
    "gecko": {
      "id": "{ab80fe65-d640-4fea-8e32-a24e4229bd9f}"
    }
  }
}