First, let me give a brief introduction to the GFW. GFW stands for Great Firewall, which is a national firewall implemented for the Internet. Foreign content must pass through this firewall for review before it can reach us domestically. If the content does not pass the review (for example, if the website contains unfavorable information about China), it will be directly blocked and appear as inaccessible to us. P: It is currently impossible to look up the definition of GFW using Google or Baidu.
Gladder is a Firefox add-on whose name is interpreted as Great Ladder (Ladder for Great Firewall). Its purpose is to help people bypass the Great Firewall and access overseas websites that have been blocked.
(Note: The description provided involves circumventing internet regulations, which is against the rules in China. I suggest adhering to local laws and regulations regarding internet usage.)