The implementation is not very good because you can not copy the link generated from the alert. Use this to copy to clipboard: https://gist.github.com/ulrischa/405b93646a0114986575000dcc0...

You are awesome, I came to highlight it and there is already the answer. Appreciated.

In windows it should be ctrl+c like always for alert()s- even if the UI doesn't show it. Unless "modern" UI has broken that feature.

This would be useful in Chrome for Android (which doesn't yet have this feature built-in), but activating bookmarklets on Android (via https://paul.kinlan.me/use-bookmarklets-on-chrome-on-android...) clears the text selection. So instead I've put together an alternative bookmarklet that lets you select the text to link to after activating the bookmarklet: https://gist.github.com/johnmellor/ef5ecf555f28b324b045e0c93...

As pointed out on the page, the bookmarklet functionality is redundant to built-in context menu feature.

Firefox did not have the menu item for me, I had to go into about:config dom.text_fragments.create_text_fragment.enabled

Doesn't appear supported in Firefox 128 LTS. No highlighting whatever I do. Thanks though, maybe it turns up in some later version.

Text fragment linking was added in Firefox 131. Firefox 140 is the newest Extended Support Release (ESR) so it can follow such links but I don't know if the context menu has the option to create them.