Examine source code of Bookmark Home Page

{
  "manifest_version": 2,
  "name": "Bookmark Home Page",
  "version": "2.1",
  "description": "A Firefox extension that replaces the home page with a custom page displaying bookmarks.",
  "browser_specific_settings": {
    "gecko": {
      "id": "@firefox-bookmark-homepage",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "bookmarks",
    "tabs",
    "storage"
  ],
  "chrome_settings_overrides": {
    "homepage": "homepage.html"
  },
  "chrome_url_overrides": {
    "newtab": "homepage.html"
  },
  "icons": {
    "48": "icons/icon-48.ico",
    "96": "icons/icon-96.ico"
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  }
}