Форум поддержки Firefox

I had a set of Firefox bookmarks but when I signed into my Firefox on my Surface Pro 3, Firefox automatically imported my Chrome browser. I went back to the library to restore it and the old version was not there.

How do I get my Firefox bookmarks back. I tried to get them from my Android phone and it also has the wrong bookmarks.

My rig: MacMini 2018. Macosx 13 Ventura. Safari browser.

Safari can export an HTML file for bookmarks and a CSV file for passwords. I saved them to my desktop. Trying every way I can in Firefox, FFox won't accept these file extensions. What is it looking for?

What am I missing? Seems to be no 2024 routine for this online. I'm probably in dark about something obvious.