https://developer.mozilla.org/en-US/docs/Web/CSS/WebKit_Exte...
Just this morning, I had to go down the WebKit pseudo-element rabbit hole to fix a layout bug in a very standard date-of-birth field.
They weren't sued for simply including IE with Windows (bundling IE and business arrangements to prevent OEMs from replacing was one of several means of leveraging the Windows desktop OS monopoly to monopolize other markets in the antitrust suit), and they didn't stop developing IE when that suit was initiated.
> But Apple is far more abusive and forbids any other browser engine on iOS
Bundling wasn't the offense, illegally leveraging the desktop OS monopoly to monopolize other markets was the offense. Bundling was part of the means but the means itself want illegal, the ends to which the means were employed were.
> "the DOJ built upon the allegation that Microsoft forced computer makers to include its Internet browser as a part of the installation of Windows software."
https://en.wikipedia.org/wiki/United_States_v._Microsoft_Cor....
It's the same exact situation with MacOS/iOS and Safari, but it's actually far worse with Apple and iOS Safari because people have no choice to install another web browser on iOS, all web browsers on iOS are Safari.
Now, finally, the DOJ is rightly going after Apple for doing this, and many, many other abusive business practices.