@Gargron What frustrates me most is if you select it and copy and paste it, the "http://" or "https://" is in the pasted text.
How do I copy without that? You cannot. It is bad user experience to put something in your paste buffer that you didn't highlight. (I also felt that it was good for users to see "https://" because it reminds people that there is a network here. It also opens the door to using other protocols without confusing people too much.)

@Gargron In my case, what you describe after the update to 140 did not happen. But there are one (or two) settings relevant in the About:config screen.
I once changed the browser.urlbar.trimURL setting to "False" (as it should be 😄 ). That setting was not altered to the default "true" in my case.
That setting alters both the displaying of http:// and https:// to display it or not.

There is also the setting: browser.urlbar.trimHttps
That only focuses itself to https. 1/2