You are guessing right, Venerable! Search for “bookmark” here on the forum, and you’ll find a lot of (older and newer) posts.
And perhaps the most definitive (and probably still valid) answer has been given here:
Sujato’s first commandment of website development:
- THOU SHALT NOT DUPLICATE IN THY WEBSITE FUNCTIONALITY ALREADY BUILT INTO THY BROWSER.
So I think your request won’t have more luck than the previous ones … 
Or perhaps the answer is still not that definitive after all? Further down in that thread I see:
It’s a commandment until someone provides a convincing argument otherwise. I’m listening!
So here’s your chance! 