Where is tcp fast open in edge?

Main question:

When I first installed windows 10, there was a setting "tcp fast open" in the edge browser, and now it's gone, how can I enable it?

Backstory:

When I first tried edge, I thought it was a laggy piece of you know what, but after googling around, I bumped into a post where a person says that if you type "about:flags" into search bar in edge, and enable the "tcp fast open" feature, your browser will work faster. I did what that person said and it worked! Everything was loading super fast like in any other modern browser.

But after some update this feature is gone. One would assume that since it was an experimental feature, it's probably enabled by default already and isn't an experimental feature anymore, but according to my browsing experience, it's not the case and 60% of the time pages take 13 seconds to load (I counted it every time).

So, is there still a way to enable tcp fast open?

Optionally, could someone tell me what this feature does and how it works? I'm really curious to know!

1 Answer

In the latest version of Windows 10, in Edge type about:flags in the address bar, then press ctrl-shift-d. This will give you additional settings on the about:flags screen and at the bottom (scroll-down!) you will see "Enable TCP Fast Open"