Examine source code of Collections

{
  "manifest_version": 3,
  "name": "Collections",
  "description": "Save pages, drag links, text and images into a sidebar and keep them in collections. Free, stored on your computer.",
  "version": "0.5.4",
  "icons": {
    "16": "icon/16.png",
    "32": "icon/32.png",
    "48": "icon/48.png",
    "96": "icon/96.png",
    "128": "icon/128.png",
    "512": "icon/512.png"
  },
  "permissions": [
    "storage",
    "tabs",
    "tabGroups",
    "contextMenus",
    "identity",
    "alarms"
  ],
  "optional_host_permissions": [
    "<all_urls>"
  ],
  "action": {
    "default_title": "Open Collections",
    "default_icon": {
      "16": "toolbar-icon/on-light/16.png",
      "24": "toolbar-icon/on-light/24.png",
      "32": "toolbar-icon/on-light/32.png",
      "48": "toolbar-icon/on-light/48.png"
    }
  },
  "commands": {
    "open-panel": {
      "suggested_key": {
        "default": "Alt+Shift+C"
      },
      "description": "Open the Collections side panel"
    },
    "collection-1": {
      "description": "Switch to collection 1"
    },
    "collection-2": {
      "description": "Switch to collection 2"
    },
    "collection-3": {
      "description": "Switch to collection 3"
    },
    "collection-4": {
      "description": "Switch to collection 4"
    },
    "collection-5": {
      "description": "Switch to collection 5"
    },
    "collection-6": {
      "description": "Switch to collection 6"
    },
    "collection-7": {
      "description": "Switch to collection 7"
    },
    "collection-8": {
      "description": "Switch to collection 8"
    },
    "collection-9": {
      "description": "Switch to collection 9"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "collections@r44j.dev",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": [
          "technicalAndInteraction",
          "personallyIdentifyingInfo",
          "websiteContent"
        ]
      }
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "sidebar_action": {
    "default_panel": "sidepanel.html",
    "default_title": "Collections"
  }
}