the symbol for "send" has disappeared from my email page. when I write the message< I cannot send it because the symbol is gone. I sent this. There was a reply but I didn't get it.

Which email provider are you using? Firefox is just a standard Browser here. Did you check or refresh to make sure the page is connected.

You see little boxes with the hex code of the character or text labels if you do not have a font installed that covers this Unicode range or block downloadable fonts or if you do not allow pages to choose their own fonts.

Small icons can be supplied by an iconic font that is downloaded from the server via @font-face CSS rules. If you have content blocking extensions then make sure that you do not block remote fonts. Also make sure you allow pages to choose their own fonts.

• Settings -> General: Fonts & Colors -> Advanced
  [X] "Allow pages to choose their own fonts, instead of my selections above"