1169306 - [e10s] Change "Enable multi-process Nightly" to not restart on OK

Status: RESOLVED WONTFIX

(Firefox :: Settings UI, defect, P4)

Description

[Jesper Hansen]

Currently when checking "Enable multi-process Nightly" in about:preferences we create a dialog with the title "Restart Nightly" and the text "Nightly must restart to enable this feature." and we restart the browser right away.

Could this be changed so the browser doesn't restart but just alerts the user that the feature will be enabled on next restart?

My use-case is that I need the browser with -console for development.

Comment 1

[:Felipe Gomes (needinfo for replies!)]

I didn't understand your use case, can you elaborate more on how the immediate restarts breaks it?

Comment 2

[Jesper Hansen]

I have nightly opened as (on windows)
1. $ firefox -no-remote -P someprofile -console 
2. Nightly running in e10s or non-e10s. Open about:preferences and flip the switch
3. Nightly restarts right away and I lose my console

Comment 3

[arni2033]

Attachment: DevEdition immediately restarted and lost all data (~5000 typed symbols).png

An unobtrusive message should be used, just like when you install an add-on that requires restart.

My use case is very easy:
1. Click opened about:preferences#general tab
2. Click the content to make sure it's focused
3. Press Spacebar to scroll the content

Result:
Given that I got used to make about ~0.2s delay between steps 2 and 3, AND that in step 2 I missed a little (but still clicked in empty area),
>DevEdition immediately restarted and lost all data (~5000 typed symbols) in opened tabs<

Comment 4

[Vlad Bacia-Mociran [:VladB]]

Hi,

I managed to reproduce this issue on the latest Aurora(46.0a2) on Windows 8.1.

User Agent: Mozilla/5.0 (Windows NT 6.3; Win64; x64; rv:46.0) Gecko/20100101 Firefox/46.0
Build ID: 20160204004009

Thank you,
Vlad

Comment 5

[Jim Mathies [:jimm]]

eventually this option goes away.

Comment 6

[arni2033]

(In reply to Jim Mathies [:jimm] from comment #5)
> eventually this option goes away.
I'm just impressed by amount of things in Mozilla products broken for years because of this
pointless excuse. "Brand new stuff" is usually even worse, and there's no intent to fix it either.

Comment 7

[Milan Sreckovic [:milan] (needinfo for best results)]

Attachment: WIP: Restart later for e10s preference

It depends on patches in bug 1285328.