documentclass{article}


makeatletter
renewcommand@makefntext[1]{%
    parindent 1em%
    noindenthbox{sfbfseries@thefnmark}hspace*{.7em plus 0pt minus 0pt}#1}
makeatother

begin{document}
  Hellofootnote{I am a footnote!}footnote{I am another footnote}.
end{document}