My memory is fairly clear on that, but I don't have a link and sticking the keywords into search engines yields mountains of tech discussions about gnash working in Mozilla firefox.
If I'm wrong (which is possible), then what did stop Moz Foundation from helping the struggling SWF projects? Did they want to help, but got no requests and didn't see the funding pleas? Or did the idea of SWF support simply never come up?
(I'm not demonising the Moz Foundation, but if no one can provide a link to evidence, then we have to look at who's version fits the context.)