Blocking tracking scripts (which is not being turned on by default (yet), but can be turned on by users) is an enormous performance boost because they really hu

Blocking tracking scripts (which is not being turned on by default (yet), but can be turned on by users) is an enormous performance boost because they really hurt page loads. That aside, as commenters everywhere will tell you, Mozilla has made huge performance improvements in Firefox over the last few years and continues to do so. It's not like Mozilla has decided to stop doing everything except privacy.