Use system fonts throughout websites.

DefaultFonts.css

body:not(.google-material-icons):not(.material-icons-extended):not(.material-icons):not(.glyphicon):not(.codicon):not(.icon):not(.big-icon):not(i):not(code):not(pre):not(.token):not(.cm-qualifier):not(.cm-keyword):not(.cm-property):not(.cm-atom):not(.cm-comment):not(.DPvwYc):not(.el-picker-panel__icon-btn) {
  font-family: -apple-system,BlinkMacSystemFont,"Segoe UI",Helvetica,Arial,sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol"!important;
  font-size: normal!important;
  letter-spacing: normal!important
}

code, pre, .token, .CodeMirror-line, .js-blob-code-container, .blob-code-content, .blob-code-inner, .hljs {
  font-family: 'SF Mono',SFMono-Regular,ui-monospace,'DejaVu Sans Mono',Menlo,Consolas,monospace!important;
  font-size: normal!important;
  letter-spacing: normal!important
}

Alternative compact version for Safari:

html body:not(.google-material-icons):not(.material-icons-extended):not(.material-icons):not(.glyphicon):not(.codicon):not(.icon):not(.big-icon):not(i), div, span:not(.google-material-icons):not(.material-icons-extended):not(.material-icons):not(.glyphicon):not(.codicon):not(.icon):not(.big-icon):not(i) { 
  font-family: -apple-system, BlinkMacSystemFont, sans-serif !important
}