Fontawesome icons are not pasted correctly

I am using Fedora and installed fontawesome via sudo dnf install fontawesome fonts. Later because it didn't work I also additionally installed the font manually via downloading the zip from the Github page and following these instructions . When I copy a icon, e.g. the Firefox Icon  via "Copy Glyph" from this Website and then I paste it into my Vim or Emacs, not the Firefox logo ist pasted, but instead a checkmark  appears. The same happens, when I insert it with the unicode insertion e.g. ctr+v u+e007. The same principle also happens with other icons: another unicode character which is not the icon appears. E.g. instead of for the Signal Messenger Icon , a cup with a straw appears. The output of file -bi on the file is text/plain; charset=utf-8 so the encoding is utf-8. How can I paste it correctly? For context: I am trying to configure the i3 bar to use icons, but since I am unable to paste them into the configuration file, this doesn't work. I searched for similar questions, but all the questions regarding the fontawesome font icons were about displaying them correctly, not pasting them correctly. I nevertheless tried some of the solutions, which didn't work.