Missing SVG Character in Font

[m4dc4p]

Trying to understand how to use this tool - I'm happy to make a fix, but I need a little help.

Using your example with the Liberine font (as in the README) as a start, I tried to create a variation where the 'A' and 'B' characters are defined by SVG:

'''xml

'''

When I this font in Firefox (I used your example page given in the README to start), only the 'A' character seems modified. The 'B' character is not changed.

Any ideas what's going on?