I enabled Multiprocess Windows in Firefox 49, but still 1 process

in Firexfox 49 I just enabled Multiprocess Windows.

browser.tabs.remote.autostart set to true, also extensions.e10sBlockedByAddons to false and adding browser.tabs.remote.force-enable equal to true.

But still 1 process for Firefox.

I disabled all add-ons but Firebug, btw.
I'm using Windows 10 - 64bit

I did something wrong?

Update

Here is about:support screenshot:

Mehdi Dehghani

Posted 2016-09-21T08:23:08.850

Reputation: 216

What does your "Multiprocess Windows" value show up as in about:support? If it's any consolation, I couldn't get this working either. – Polynomial – 2016-09-21T08:33:28.960

Have a look here: http://superuser.com/questions/1029400/how-to-enable-electrolysis-e10s-on-mozilla-firefox-beta/1108314#1108314 it should help

– AdamKalisz – 2016-09-21T08:33:55.540

2@AdamKalisz I've tried all of those steps and run into the same problem as OP. Same system (Win10 x64) and same Firefox release. Multiprocess Windows shows as "1/1 (Enabled by user)" as it should; it just doesn't actually run more than one process. – Polynomial – 2016-09-21T08:39:20.330

I just added screenshot of about:support tab – Mehdi Dehghani – 2016-09-21T08:45:17.520

I don't know much more about it, but it was rather complicated, when more processes actually get started. Firebug is unknown: http://arewee10syet.com/ if it works, try disabling it as well maybe? Multi-content process is in the works so it seems: https://wiki.mozilla.org/Electrolysis/Multiple_content_processes (Linked from https://wiki.mozilla.org/Electrolysis#Schedule_and_Status)

You are still running more threads so it isn't that bad.

– AdamKalisz – 2016-09-21T08:47:15.757

@AdamKalisz I just disabled Firebug too, but no success. I just wondering any user of that 1% could get multiple process or not. – Mehdi Dehghani – 2016-09-21T08:59:56.577

Answers

Seems like enabling e10s not working on Firefox for now, so I just installed Firefox beta (currently v50) and after disabling all add-ones, I could get 2 processes for Firefox (by following mentioned steps in my question).

BTW, As you know, Firebug doesn't work if you enable e10s and you have to work with Firefox's dev console. it's not bad, but maybe a little uncomfortable if you are Firebug guy

More info about that: Firebug 3 & Multiprocess Firefox (e10s)

Mehdi Dehghani

Posted 2016-09-21T08:23:08.850

Reputation: 216

Windows aside, for a moment, with the current implementation of e10s it's normal to find:

no more than one process for all tabs

– https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=211233#c12 describes the content process in a FreeBSD context.

Graham Perrin

Posted 2016-09-21T08:23:08.850

Reputation: 1 147

1If you use Beta or Developer edition or even Nightly, you can have one process for each tab. – Mehdi Dehghani – 2016-11-19T19:08:10.153

Thanks @MehdiDehghani (aside: none of those are ported to FreeBSD; re: https://forums.freebsd.org/threads/53082/#post-297965 I might try (on FreeBSD) a version for Linux).

– Graham Perrin – 2016-11-26T14:19:03.107