If a glyph with a certain Unicode exists but its name doesn't match with the glyphBrowser database, it will be added to the font. This will create a duplicate Unicode in the font, meaning two glyphs with different names but the same Unicode. There are two options to fix this:
glyphBrowser should not add a glyph, they already exist.
glyphBrowser can ask if it can rename already existing ones to match the database.
If a glyph with a certain Unicode exists but its name doesn't match with the glyphBrowser database, it will be added to the font. This will create a duplicate Unicode in the font, meaning two glyphs with different names but the same Unicode. There are two options to fix this:
What do you think?