Blocks the page by adding a semitransparent white overlay on top of it.
Ovu skriptu ne treba izravno instalirati. To je biblioteka za druge skripte koje se uključuju u meta direktivu // @require https://update.greasyfork.org/scripts/468732/1205573/blockPage.js
Use "blockPage()" to block the page and "unblockPage()" to unblock it.