Examine source code of Alongside

{
  "manifest_version": 3,
  "name": "Alongside",
  "description": "Invite an agent onto the page you are on as a peer with its own key (agent client not included). Plus live co-browsing.",
  "version": "0.1.0",
  "icons": {
    "16": "icons/16.png",
    "32": "icons/32.png",
    "48": "icons/48.png",
    "96": "icons/96.png",
    "128": "icons/128.png"
  },
  "action": {
    "default_title": "Alongside"
  },
  "commands": {
    "_execute_sidebar_action": {
      "suggested_key": {
        "default": "Alt+Shift+A"
      },
      "description": "Open the Alongside panel"
    },
    "highlight-selection": {
      "suggested_key": {
        "default": "Alt+Shift+H"
      },
      "description": "Highlight the selected text"
    },
    "add-note": {
      "suggested_key": {
        "default": "Alt+Shift+N"
      },
      "description": "Add a note to the selected text"
    },
    "focus-bar": {
      "suggested_key": {
        "default": "Alt+Shift+P"
      },
      "description": "Move focus to the Alongside bar"
    }
  },
  "permissions": [
    "storage",
    "tabs",
    "idle"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "alongside@pooriaarab.com",
      "strict_min_version": "150.0",
      "data_collection_permissions": {
        "required": [
          "personallyIdentifyingInfo",
          "personalCommunications",
          "browsingActivity",
          "websiteContent",
          "websiteActivity"
        ]
      }
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "sidebar_action": {
    "default_panel": "sidepanel.html",
    "default_title": "Alongside"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "run_at": "document_idle",
      "js": [
        "content-scripts/content.js"
      ]
    }
  ]
}