Symbolset keywords work in many Adobe programs including Photoshop, Illustrator, InDesign, and anywhere else OpenType features are supported. Unfortunately Adobe Fireworks does not yet support OpenType features, so keywords will not work as expected.
You can, however, copy and paste the unicode glyphs from your documentation.html file (found in your download zip) into Fireworks fairly easily:
If you want to see OpenType features come to Fireworks, please recommend it to Adobe here:
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