Some websites hijack the user's browser back button, specifically manifested as: when a user clicks on a website from search engine results and then wishes to return using the browser back button, they find that they cannot go back and remain on other pages of that site. It is suggested to provide corresponding settings in 'about:config' to prevent this. For a more detailed introduction, please refer to the following news: https://www.gsqi.com/marketing-blog/hijacking-the-back-button-gaming-navboost/