I am running CentOS 7 (3.10.0-123.20.1.el7.x86_64) with kmod-nvidia-304xx-304.125-1.el7.x86_64 to support my NVIDIA Corporation NV44 [GeForce 7100 GS] video card (as identified by the invidia-detect utility). I was printing from Firefox with no problems until I upgraded to CentOS 7 kernel 3.10.0-229.11.1.el7 and kmod-nvidia-304xx-304.125-2.el7, which my video card apparently did not support. I was able to downgrade my version of the kernel and kmod-nvidia-304xx to the original versions, and everything started working correctly, including being able to run Firefox, but now when I print from Firefox the output is much too wide. This is true of both text and images. All my other applications are able to print correctly, including the Opera internet browser. I have tried all the suggestions in the "Fix printing problems in Firefox | Firefox Help" page (https://support.mozilla.org/en-US/kb/fix-printing-problems-firefox) and the "Reset Firefox preferences to troubleshoot and fix problems | Firefox Help" page (https://support.mozilla.org/en-US/kb/reset-preferences-fix-problems). It seems the Firefox is having problems reading my video memory correctly, but this is just a guess. Any suggestions for other fixes to try would be greatly appreciated, and thank you for your attention.