When the 'Detect Captive Portal' setting is enabled, IceCat segfaults
before the browser window is displayed when restarted, even with the
--safe-mode option.
It works when run with the --migration option, but reports the following
error:
JavaScript error: resource://gre/modules/CaptiveDetect.jsm, line 296:
NS_ERROR_FAILURE: No canonical URL set up.
To disable the setting, I had to go to my profile directory and edit
prefs.js to remove the network.captive-portal-service.enabled line or
change it to false.
I use Guix's GNU IceCat 91.11.0esr.
This bug has also been confirmed on Parabola.
