[EMAIL PROTECTED] wrote: > Sometimes it returns zero pointer for primary shell and I don't know the > reason of > it.
Could be anything ranging from the iframe being display:none to the presentation just not being set up yet. The latter case might well be happening here, I suppose. When is the DocumentViewerImpl::Show call that should create the presshell happening? Before or after the OnStartRequest? > Please explain purpose of PresentationShell and its relations with > other objects (frame, document, etc). The presshell is what owns and manages the frame tree, basically. > What do you think is it correct behaviour (absence of primary shell) > during reload or something wrong? It really depends on the exact markup. That said, any non-deterministic behavior is probably a bug. -Boris _______________________________________________ dev-tech-layout mailing list [email protected] https://lists.mozilla.org/listinfo/dev-tech-layout

