[londons_explore]

Note that while the code was written in 2014 (well after the iphone was released), someone tried to remove the code this year[1], and gave up because some sites now rely on this hack.

[1]: https://github.com/WebKit/WebKit/commit/049188a35af6c67fa30c...

[oefrha]

Of course, all observable behaviors of your system will be depended on by somebody.

[Anunayj]

Relevant xkcd: https://xkcd.com/1172/

[bdash]

The code was added to the public WebKit source tree, but it wasn't written at the time. It was upstreamed from the internal fork of WebKit that Apple used for iOS.

[saagarjha]

Do you know how long this fork existed?

[bdash]

Sorry, I don't recall.

[thrdbndndn]

It didn't specify which websites, now I'm curious.