Examine source code of Bookmark & Tab Manager

{
  "manifest_version": 3,
  "name": "Bookmark & Tab Manager",
  "version": "1.1.1",
  "description": "Save open tabs, clean duplicate bookmarks, export HTML, and review browsing history locally. Sidebar, dark mode, EN/TR.",
  "author": "Sercan Solmaz",
  "homepage_url": "https://sercansolmaz.com",
  "permissions": [
    "bookmarks",
    "tabs",
    "storage",
    "history"
  ],
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    },
    "default_title": "Bookmark & Tab Manager"
  },
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "sidebar_action": {
    "default_title": "Bookmark & Tab Manager",
    "default_panel": "sidepanel.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "commands": {
    "_execute_action": {
      "suggested_key": {
        "default": "Ctrl+Shift+B",
        "mac": "Command+Shift+B"
      },
      "description": "Open Bookmark Manager"
    },
    "save_tabs": {
      "suggested_key": {
        "default": "Ctrl+Shift+S",
        "mac": "Command+Shift+S"
      },
      "description": "Save all tabs"
    },
    "_execute_sidebar_action": {
      "description": "Open Sidebar"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "bookmark-tab-manager@sercansolmaz.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}