-private const val SCHEMA_VERSION = 16
-private const val PREFERENCES_TABLE = "preferences"
-
-// Define the private preferences constants.
-private const val ID = "_id"
-private const val JAVASCRIPT = "javascript"
+private const val ALLOW_SCREENSHOTS = "allow_screenshots"
+private const val AMP_REDIRECTS = "amp_redirects"
+private const val APP_THEME = "app_theme"
+private const val BLOCK_ALL_THIRD_PARTY_REQUESTS = "block_all_third_party_requests"
+private const val BOTTOM_APP_BAR = "bottom_app_bar"
+private const val CLEAR_CACHE = "clear_cache"
+private const val CLEAR_COOKIES = "clear_cookies"
+private const val CLEAR_DOM_STORAGE = "clear_dom_storage"
+private const val CLEAR_EVERYTHING = "clear_everything"
+private const val CLEAR_FORM_DATA = "clear_form_data" // Clear form data can be removed once the minimum API >= 26.
+private const val CLEAR_LOGCAT = "clear_logcat"