Quote:Did you know that Firefox filters certain sites so that they don't appear in the Top Sites and Highlights listing on the New Tab Page?

Firefox's Top Sites listing on the New Tab Page displays popular sites visited by the user and sites and search shortcuts that Mozilla added to the listing by default.

Mozilla implemented a filter for the top sites listing in 2014 to prevent certain sites from appearing on the New Tab Page.

The reason for the filter? conflicts with commercial partners. Kevin Ghim opened the issue on Bugzilla in 2014 using the following description:

Quote:Problem: commercial partners do not want their content to be negatively associated with adult content. In the context of Suggested Tiles, this means no sponsored or affiliate tiles should appear within same browser viewport. As an example, MGM would not want a 007 DVD release to be appearing within the same page (in particular, directly next to) where PirateBay tile appears.

In other words, commercial partners who are interested in placing sponsored tiles on the New Tab Page might not wand their content displayed next to sites opened by the user that may affect the sponsored content negatively.

Full reading: https://www.ghacks.net/2019/01/08/how-to-disable-firefoxs-adult-filter-on-the-new-tab-page/