This is a followup to their Screw it, I’m installing Linux article in November.

Since that article was published, I have dealt with one minor catastrophe after another. None of that has anything to do with Linux, mind you. It just meant I didn’t install it on my desktop until Sunday evening.

Linked from the Linuxiac post:

Mozilla’s Phabricator revision D277804

The proposed change just stops setting middlemouse.paste to true by default, and there are comments suggesting tying it to GTK’s corresponding preference.

GNOME merge request: Disable primary-paste by default

People that know about this functionality and really love this functionality can easily override the setting.

gsettings set org.gnome.desktop.interface gtk-enable-primary-paste true

Not mentioned in the OP is that both discussions include a setting to enable middle mouse button paste for those who want it; it will just be off by default. Everyone calm down.