alt Hacker NewsThere's a difference between HN getting the final text when you hit "reply" and a site using JavaScript to time how long it takes you to hit each individual key press and how many times you hit backspace or moved your mouse to switch to a different tab to look something up or if you made up some facts in the comment or if you used an extension like grammarly or anything else.
>site using JavaScript to time how long it takes you to hit each individual key press and how many times you hit backspace
You mean like a video game? Are video games now nefarious applications tracking you? Your browser is not "leaking" anything to websites. It's hard to understand what you are even complaining about. If you don't want grammarly to record your keystrokes, then don't install grammarly.
It's like ordering a beer and then complaining about alcohol.