I’ve tested some of the solutions there, but they seem to require too much friction:
click on the button,
copy the text,
create a new file manually,
paste the text.
Some of them do download the actual file, but they place it in ~/Downloads and you have to manually move them over.
I’ve created a one-click solution. Simply click on the button in your browser and view the article straight from Obsidian. The setup is a bit tricky, so I’ve created a separate topic for it: