I know that there\'s many other problems similar to this, but mine doesn\'t seem to meet any of the criteria of the other issues.
My Bootstrap 3 glyphicons are worki
Firefox has a strict setting(this) that prevents your HTML file from accessing your web fonts from folders not on the root. This only happens when you work locally and not from files on a server. You have to change a setting in Firefox to display the glyphicons when you develop locally.
-open "about:config" in your address in firefox
-Then search for "security.fileuri.strict_origin_policy" property and change it from "true" to "false". (ignore quotation marks of course)