Using Bootstrap 3's Glyphicon has led to some unexpected issues. In Firefox, icons like glyphicon-fire and glyphicon-calendar are showing up as "📅", while they work perfectly fine in Chrome.
I've checked the font and css files locations, and even tried various versions of Bootstrap from both http://getbootstrap.com/ and GitHub, but none of them seem to solve the problem.
If anyone has any suggestions on how to resolve this issue, I would greatly appreciate it. Thank you.
P.S: The situation gets even stranger - sometimes the icon-calendar shows up correctly when I press ctrl-f5, only to revert back to displaying "📅" when I simply hit f5.