Mozilla has made a pledge to counteract cross-site tracking across the web, and it's delivering on part of that promise with the latest update to Firefox. Starting with Firefox 63, which is rolling out now, Mozilla has introduced the option to block trackers while you go about your browsing.
In Firefox's "Options/Preferences" settings, you'll now find a new "Third-Party Cookies" option under Privacy and Security. From there, you'll have two options: you can either block trackers only or opt to block all third-party cookies. The latter option will be the most comprehensive approach, but it could also cause some websites to break. Both options are off by default, so as to "balance these new preferences with the experiences our users want and expect," Mozilla says.
If you ever encounter any odd issues due to cookie blocking, you can whitelist sites from the address bar by clicking the shield icon and selecting "Disable Blocking For This Site."
Today's update also introduces a couple of other notable features for Windows users. First up, Firefox will now respect your Windows theme settings, adjusting to match the dark or light theme as you've set it in your Windows settings. Also tagging along are new search shortcuts, which will pin Amazon and Google to the new tab page. This is live in the U.S. only at this time.