Is there an extension for Firefox, which allows duplicating tabs as Opera does?

What I exactly mean by duplicating:
I want to open a new tab, which contains the same web page. But I also want browsing history copied in the new tab, so that I can press "Go back" button in the duplicated tab.

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Try this site,

https://addons.mozilla.org/" title="https://addons.mozilla.org/">https://addons.mozilla.org/

Do a search on "duplicate tab extensions"

Best Wishes and have fun but be careful.

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