Double Firefox windows on Linux

[sfroberg]

Hi.

The"user_pref("privacy.clearOnShutdown.openWindows", true);" caused double firefox processes to be
started on Gentoo 64-bit Linux and Firefox version 52.4.0

Commenting it out fixed things

[pyllyukko]

Yes it does. See:

• Open Firefox two instances version 49<=53 #292
• Two windows are opened due to privacy.clearOnShutdown.openWindows #288
• User.js causing firefox to open two windows #308
• https://bugzilla.mozilla.org/show_bug.cgi?id=1334945

[berrythesoftwarecodeprogrammar]

affects me too

• Windows 10
• Firefox ESR 52.8.0

thanks OP. I had to do this to fix it:

1. exit firefox
2. set privacy.clearOnShutdown.openWindows to false in user.js
3. run firefox (it will open 2 windows still)
4. exit firefox
5. comment out privacy.clearOnShutdown.openWindows in user.js
6. run firefox (it will be fine now)