Mozilla doing Content Blocking UI overhaul in Firefox 65, moving forward, they’ll remove the global content blocking toggle from the application menu and preferences, the changes will also be reflected in Control Center where trackers and third-party cookies details are shown for a site. Instead of offering on/off switch, Trackers and third-party cookies as choices for Content blocking mode, the company wants to bring the standard, strict and custom as new options according to a specification.
November 21, 2018 Update: The changes to content blocking are now landed and live in latest Firefox Nightly.
Firefox new Content Blocking modes
Standard: This will be the default in normal browsing mode, balances Firefox for protection and performance, allows some trackers for some websites to function, but blocks known trackers in private browsing mode and third-party tracking cookies by default.

Strict: Blocks all trackers and third-party cookies the Firefox browser detects in all windows (normal and private), this may break some sites.
Custom: gives users complete control, they can allow or deny trackers and cookies.
When the custom/ Strict option is selected in Content Blocking settings, a warning will be shown at the bottom to inform user that, blocking cookies and trackers may cause some sites to stop working and offers a link to help page that guides on how some trusted sites can be unblocked, advanced users can select this.


Image credits: Mozilla invisionapp
Firefox 64 is a major update
In other news, Firefox 64, currently in beta that received an option to opt-out of extension recommendations, to bring native notifications and Share dialog support to Windows 10.
Coming to UI changes, add-ons manager UI is going for a redesign to sport card-like style and tab context menu to contain radical changes and the user can perform various operations on multiple selected tabs.
The company has updated about:performance page for power users, which now shows energy impact per each tab, it will be a complete task manager in Firefox 65 once memory column gets added. This version also lost a feature, Mozilla has removed RSS and live bookmarks support from this version.
Firefox 64 could be the major Firefox Quantum version after 57, that is scheduled to release on December 11, 2018.
What do you say on these developments?