"Select all and Copy" in Firefox is just an implementation of CTRL+A followed by CTRL+C.

I just used the "manual way" in Chrome, pasted the result into MS-Word, and all formatting is retained.
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Brian - Windows 10 Pro, 64-Bit, Version 1909, Build 18363  

Science has become just another voice in the room; it has lost its platform.  Now, you simply declare your own truth.

      ~ Dr. Paul A. Offit, in New York Times article, How Anti-Vaccine Sentiment Took Hold in the United States, September 23, 2019