Support of IAccessibleEditableText::replaceText method (IAccessible2 interface) in Firefox 3.0(.12)

Hi,

I am trying to use accessibility to fill fields (write)  in Firefox and
other web browsers.

I know that firefox has not implemented the put_accValue method of the
IAccessible interface. So i am using IAccessible2 to write into Firefox
fields, and more specifically the IAccessibleEditableText object and its
replaceText method. My program is a C++ program and i am also using
IAccessible2Proxy.dll.

Everything works fine with Firefox 3.5 but Firefox 3.0.12 returns an error
0x80004005 when calling replaceText (saying, I guess, that the method is not
implemented).

A response coming from Aaron Leventhal (01-2008) to a quite similar question
about put_accValue support in firefox was :
*"put_accValue isn't all that useful since you can only change the entire
string at once.
That's why we have methods to move the caret, delete a substring, insert
text at an offset, etc. in the IAccessible2 family of interfaces which
Firefox 3 beta supports "*

But Is really Firefox 3.0 supporting IAccessibleEditableText  ant its method
replaceText ?