1359601 - Switching between multiple GeckoViews results in white screen

Status: RESOLVED INVALID

(GeckoView :: General, enhancement)

Description

[Dylan Roeh (:droeh) (he/him)]

I tracked the cause of this down to bug 1332331. Working on GV-based custom tabs, previously I had relied on just removing remote="true" from the browser element in geckoview.xul to disable e10s; after the patch for bug 1332331 I have the following problem:

Open a custom tab from one app, leave it running
Open a custom tab from a second app
Switch back to the first custom tab

You should see the first custom tab displayed normally, of course; instead you now get a white screen. I've tried adding remote="true" back into the browser element in geckoview.xul and using the GeckoViewSettings to disable e10s, but this results in a start-up crash.

Comment 1

[Dylan Roeh (:droeh) (he/him)]

Eugen, any ideas here? I'm looking into the start-up crash that happens when I try to disable e10s view GeckoViewSettings a bit more at the moment.

Comment 2

[Dylan Roeh (:droeh) (he/him)]

Oops, the start-up crash was just my mistake. Unfortunately the reality isn't much better; on opening the second custom tab, we get a black screen for a few (~5ish) seconds followed by a white screen, and logcat messages about failing to launch the tab subprocess.

Comment 3

[Dylan Roeh (:droeh) (he/him)]

OK, should've thought to try this to begin with, but: removing remote="true" AND disabling e10s via GeckoViewSettings seems to do the trick. However, I was hoping with the e10s toggle that I would no longer have to remove remote="true" from geckoview.xul, as we need to address that before landing GV-based custom tabs. Eugen, any thoughts here? Am I just stuck waiting for us to be able to use custom attributes for GV?

Comment 4

[Eugen Sawin [:esawin]]

With bug 1332331 we removed the remote attribute from geckoview.xul. Adjusting the GeckoView multiprocess setting (on by default) should work.

If you need a way to pass the setting through XML attributes, you'll need to block on bug 1359422.

Comment 5

[Dylan Roeh (:droeh) (he/him)]

Ah, I didn't notice bug 1332331 removed the remote attribute -- thought that was just carried over from my GV custom tabs patch. Thanks for the info. Closing this since it's no longer relevant.