This is in Nightly. I know people often times do _not_ expect breakage, because Nightly has been pretty stable for a long time. But that's not a guarantee. Mos

This is in Nightly. I know people often times do _not_ expect breakage, because Nightly has been pretty stable for a long time. But that's not a guarantee. Most people will be concerned about lacking Web Extensions support. It's indeed not there yet and this is why this blog post is your heads-up to move to a more stable channel. Web Extensions are being worked on as you can see dependent bugs linked from this meta issue in bugzilla: https://bugzilla.mozilla.org/show_bug.cgi?id=1582185 https://bugzilla.mozilla.org/show_bug.cgi?id=1582185 And FYI, for me personally the built-in tracking protection has been a decent replacement for my favorite add-ons, so I'm personally quite fine with this change :-)