Firefox 90 introduces the following model of SmartBlock, the browser’s tracker blocking mechanism constructed into its non-public looking and strict modes, which now has enhancements designed to stop buttons that allow you to log into web sites utilizing your Facebook account from breaking, Mozilla introduced on Tuesday.

SmartBlock was first launched with Firefox 87 in March, and in case you aren’t acquainted, right here’s Mozilla’s description of the way it works, from the company’s blog:

SmartBlock intelligently fixes up internet pages which can be damaged by our monitoring protections, with out compromising consumer privateness.

SmartBlock does this by offering native stand-ins for blocked third-party monitoring scripts. These stand-in scripts behave simply sufficient like the unique ones to guarantee that the web site works correctly. They permit damaged websites counting on the unique scripts to load with their performance intact.

Sometimes, although, the function would break Facebook login buttons. In a new blog post, Mozilla’s Tom Wisniewski and Arthur Edelstein clarify why this might occur, utilizing an instance of making an attempt to log in to Etsy.

“Prior to Firefox 90, if you were using a Private Browsing window, when you clicked on the ‘Continue with Facebook’ button to sign in, the ‘sign in’ would fail to proceed because the third-party Facebook script required had been blocked by Firefox,” they write.

With Firefox 90 and SmartBlock 2.0, although, you must be capable of use Facebook login buttons all whereas SmartBlock 2.0 nonetheless blocks cross-site monitoring. On the up to date browser, “initially, Facebook scripts are all blocked, just as before, ensuring your privacy is preserved,” they write. “But when you click on the ‘Continue with Facebook’ button to sign in, SmartBlock reacts by quickly unblocking the Facebook login script just in time for the sign-in to proceed smoothly.”

Firefox 90 is launching Tuesday.