Why are "Copy link to highlight" links not implemented in Firefox yet? [closed]

Solution 1:

Why was this feature not implemented in Firefox?

That is a question that Firefox's developers will asnwer better than any of us (unless one of them is a member here).

Before being a part of a feature of Chrome, it was an extension of the browser as stated here

First launched as a browser extension called Link to Text Fragment last year, Google has now added the feature within Chrome itself.

Link to Text Fragment was introduced last year (2020) by Google. I even gave an answer mentioning it. It's open source and a version exists for Firefox (I know you didn't ask for it).