Hi Berto, I applied upstream's patch https://bug-197658-attachments.webkit.org/attachment.cgi?id=369368 to the sources of webkit2gtk_2.24.1-1 in my debian box, and installed them.Then I surely confired to fix problems reported by debian bug #926872 and #928399.
Thank you for all things. I'm looking forward to releasing newer version of libwebkit2gtk in debian. Takahide Nojima