"Firefox is already running, but is not responding."

devmrfitz · 2021-02-02 15:42:30

I have firefox open and then execute

 firefox-nightly example.com

in terminal. This opens a pop up saying "Firefox is already running, but is not responding. To use Firefox, you must first close the existing Firefox process, restart your device, or use a different profile.". However, my Firefox window is working perfectly normal. Why doesn't it simply open a new tab?

Last edited by devmrfitz (2021-02-02 16:49:17)

Ropid · 2021-02-02 16:06:00

It works for me, I don't get that error you are seeing. My running Firefox opens a new tab with the location I had on the command line.

I use XFCE. The "firefox" package is version "85.0-1".

devmrfitz · 2021-02-02 16:19:33

I'm using firefox nightly 87.0a1

Ropid · 2021-02-02 16:33:51

Are you sure "firefox" is then the right command to start it? The package for Nightly perhaps installed a different name for starting it so that it doesn't clash with the command in the Arch "firefox" package.

devmrfitz · 2021-02-02 16:49:35

Ropid wrote:

Are you sure "firefox" is then the right command to start it? The package for Nightly perhaps installed a different name for starting it so that it doesn't clash with the command in the Arch "firefox" package.

Edited my post

nhumrich · 2021-04-20 16:42:58

I had this same issue. I fixed it for myself by adding GDK_BACKEND=wayland to the environment variables when I start up firefox (in the firefox.desktop file)

Sierra · 2021-12-16 07:51:23

>> ... adding GDK_BACKEND=wayland to the environment variables when I start up firefox (in the firefox.desktop file)

I tried inserting 'GDK_BACKEND=wayland' before '/opt/firefox/firefox %u' so it looks like this in firefox.desktop:

Exec=GDK_BACKEND=wayland /opt/firefox/firefox %u

But now the menu can't find it. I also tried adding this to that desktop file:

TryExec=/opt/firefox/firefox

But that didn't seem to help.

Any ideas? I don't see a separate place to add an environment in the desktop file in the xdg specs.

I'm running Debian/Bullseye and Firefox quantum. Thanks.

icar · 2021-12-16 08:24:02

Exec=env GDK_BACKEND=wayland /opt/firefox/firefox %u

would be the correct syntax. https://wiki.archlinux.org/title/deskto … _variables

Are you launching it from an Xwayland terminal? In that case you'll need MOZ_DBUS_REMOTE=1

Ah, you are using Debian and asking in Arch forums... Ok.

Last edited by icar (2021-12-16 08:24:58)

V1del · 2021-12-16 10:09:06

The env isn't required but GDK_BACKEND is the wrong variable for firefox, you need to set MOZ_ENABLE_WAYLAND=1.

But yes in any case, we can't really help with debian issues and this thread is close to a year old. Closing.

Arch Linux

#1 2021-02-02 15:42:30

"Firefox is already running, but is not responding."

#2 2021-02-02 16:06:00

Re: "Firefox is already running, but is not responding."

#3 2021-02-02 16:19:33

Re: "Firefox is already running, but is not responding."

#4 2021-02-02 16:33:51

Re: "Firefox is already running, but is not responding."

#5 2021-02-02 16:49:35

Re: "Firefox is already running, but is not responding."

#6 2021-04-20 16:42:58

Re: "Firefox is already running, but is not responding."

#7 2021-12-16 07:51:23

Re: "Firefox is already running, but is not responding."

#8 2021-12-16 08:24:02

Re: "Firefox is already running, but is not responding."

#9 2021-12-16 10:09:06

Re: "Firefox is already running, but is not responding."

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