In addition to common things like UI elements, Netflix even A/B tests site performance aspects to see how they affect user behaviour!
https://www.quora.com/What-types-of-things-does-Netflix-A-B-test-aside-from-member-sign-up
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I'm experimenting with live-evaluating tests in my programming language project.
It's relatively fiddly to hook up a UI for this, but it saves a precious keystroke to run the tests! I'm hoping that it results in more, better tests due to the convenience.
The "line of death", where the browser UI splits between trusted UI elements and UI controlled by the website.
Also argues that HTTP warnings are better than HTTPS padlocks, because there's incentive to spoof padlocks lower on the page.
https://emilymstark.com/2022/12/18/death-to-the-line-of-death.html
New version of difftastic is out!
* Fixed a nasty crash that was relatively common
* Minor display and performance fixes
https://github.com/Wilfred/difftastic/releases/tag/0.60.0