The channel.redirectTo() API being implemented in 765934 will land disabled in Electrolysis because http-on-modified-request observer notifications are not being sent to child processes. Once this has changed, the API should be enabled in e10s.

This goes over the top of https://bugzilla.mozilla.org/attachment.cgi?id=700090 and https://bugzilla.mozilla.org/attachment.cgi?id=700135

Comment on attachment 700154 [details] [diff] [review] Enable the channel.redirectTo API for e10s Review of attachment 700154 [details] [diff] [review]: ----------------------------------------------------------------- +r, but we'll only need the xpcshell.ini changes here--the rest will be part of bug 827269. thanks!

I suggest we WONTFIX this. If/when we have extensions in e10s-enabled builds, the extensions will run in the parent process and they will only be able to process on-modify-request in the parent process. (As far as we can tell, it is necessary to keep addon code running in the parent process in order to have any hope of having an effective sandbox.)