Meta refresh should pass VALIDATE_ALWAYS instead of LOAD_BYPASS_CACHE For some reason meta refreshes of more than 15 seconds set LOAD_BYPASS_CACHE when triggering the new page load. That seems really overkill to me. All that is required is that all of the page contents be validated. I think we should switch to VALIDATE_ALWAYS. Basically, I'm proposing a change to this code: http://lxr.mozilla.org/mozilla/source/docshell/base/nsDocShell.cpp#5974 I think this should block freezing nsIWebNavigation.

So VALIDATE_ALWAYS will check with the server even if it's not expired from local cache yet? If so, this sounds like a perfectly reasonable change.

Yes, VALIDATE_ALWAYS unlike LOAD_BYPASS_CACHE will do a conditional query whenever possible. Otherwise, they are equivalent.

Here we go.

fixed-on-trunk