After updating Firefox, Firefox cannot be started with error

Solution Verified - Updated -


  • If Firefox(and the dependency package systemd)are updated to the latest version (RHEL 7.9) in the RHEL 7.1 environment, you will not be able to start Firefox, and it shows:
XPCOMGlueLoad error for file /usr/lib64/firefox/
/usr/lib64/firefox/ undefined symbol: gdk_window_get_scale_factor
Couldn't load XPCOM.


  • Red Hat Enterprise Linux 7.1

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