Works even in private FB groups, thank you! I use it in conjunction with yt-dlp. I click “export all cookies” and then use it from there:
yt-dlp.exe --cookies cookies.txt “your_url”
The 'cookies.txt' file must be in the same directory as yt-dlp.exe

perfect!

Export As doesn't work but it doesn't matter - just click "Export" and you will get your file

export as doesn't work.