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How do I change the default paper size for printing?


I am running Firefox 3.6.3. Recently, the default paper size for printing unexpectedly changed to a user-defined size of 3.00" x 4.57". It used to be letter size (8.5 x 11). The default paper size is 8.5 x 11 for everything else. I have tried changing the size in the preferences dialog box and then clicking "default", but after I close Firefox or if Firefox opens a new window, the default size switches back to 3.00" x 4.57". Does anyone know how to fix this?

This happened

Every time Firefox opened

== About 2 weeks ago

Additional System Details

Installed Plug-ins

  • -Office Plugin for Netscape Navigator
  • Java(TM) Platform SE binary
  • The QuickTime Plugin allows you to view a wide variety of multimedia content in Web pages. For more information, visit the QuickTime Web site.
  • Coupons, Inc. Coupon Printer DLL
  • Coupons, Inc. Coupon Printer Plugin
  • Default Plug-in
  • Shockwave Flash 10.0 r22
  • iTunes Detector Plug-in
  • 3.0.50106.0
  • Java Plug-in 1.6.0_13 for Netscape Navigator (DLL Helper)
  • Adobe PDF Plug-In For Firefox and Netscape


  • User Agent: Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US; rv: Gecko/20100401 Firefox/3.6.3 (.NET CLR 3.5.30729)

More Information

Question owner

Having a similar issue, except mine is stuck on paper instead of A4.

Question owner

Found a way to configure this:

In the address bar type "about:config" Promise to be careful (and be!) Enter "print.postscript.paper_size" in the filter box and press enter Double click the entry named "print.postscript.paper_size" Enter "paper" in the dialog box and press OK. (I changed mine to A4.) After this I restarted firefox to check that the change were permanent, and it was :)

Question owner

I completely uninstalled Firefox, rebooted, and reinstalled. This has corrected the paper size issue noted above. However, it still has not corrected an issue for viewing PDF's. The PDF plug-in will work when initially installed, but when Firefox is closed and restarted, an error message appears.

Helpful Reply

I got stuck with Legal size paper. I found a couple of things helped my problem.

One: in Page Setup, Format and Options - turn off scale to fit page width

Two: Print, Properties - click Advanced Paper Selection and select the proper paper size. Then OK until you get back to print.

gemery 0 solutions 1 answers

Option one from the previous post finally helped me change my default 'Letter' to 'A4' paper size type.

After faffing around for days changing the config (as helpfully described by other posts/forums) and various other settings, the simplest option of just turning off the 'shrink to fit Page Width' worked.


kostenzer 0 solutions 2 answers

Helpful Reply

In "mine" dutch firefox 3.6.12 there is no option to change paper-size see "about:config" Promise to be careful (and be!) Enter "print.postscript.paper_size" gives a empty screen "paper_size" gives a few results

What about the numbers 4259872, 4784247 and what is the meaning of paper_size, paper_size_type , paper_size_unit

  • Top 10 Contributor
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3198 solutions 24426 answers

1. {Ctrl + P}
2. Make the correct printer is selected in Printer - Name.
3. Hit the Properties button.
4. Select the correct paper size there.

Those 7 digit paper size preference numbers don't look correct - looks like a b0rked setting to me, unless that is a "custom size" that is "User defined".