This is Firefox's overhauled Privacy interface

[harlan4096]

Mozilla plans to overhaul the privacy interfaces of the Firefox web browser in coming versions. Planned changes include interface modifications, detailed views of blocked and allowed items, and introduction of content blocking presets.

Current versions of the Firefox browser support content blocking that Mozilla added in Firefox 63 to the browser.

Firefox users may select to block detected trackers and third-party cookies in that version of the browser. While third-party cookie blocking was supported before, the new implementation improved the visibility of the option significantly.

All options are located on about:preferences#privacy. Content blocking is also exposed in the main Firefox menu and when users click on the site information icon on the left side of the URL of the activate website.

Note: The changes are still in development and it is possible that changes will be made to the functionality or the design.

Full reading: https://www.ghacks.net/2018/10/28/this-i...interface/