Also, most Unicode experts would tell you not to use 0xFB01 in new stuff today and instead should rely on font ligatures for it. 0xFB01 was included in Unicode

Also, most Unicode experts would tell you not to use 0xFB01 in new stuff today and instead should rely on font ligatures for it. 0xFB01 was included in Unicode for cross-compatibility with older encoding schemes for systems that didn't support fonts with ligatures. Today we have support for fonts with ligatures.