Comment 175 for bug 10910

I tested my hypothesis above. I made a Live USB stick with space to save settings and updates. I used ubuntu-14.04.2-desktop-amd64.iso. After changing languge settings to finnish and installing all localization files I opened Firefox for the first time. Paper size in firefox was letter, not A4 as it is supposed to be.

Then I changed the variable print.postscript.paper_size to iso_a4 in Firefox config, closed and reopened Firefox and checked if the paper size change persisted. It did, also it was still A4.

After that I did sudo apt-get update followed by sudo apt-get upgrade. After that and restarting Firefox the paper size was still A4.

I think this proves my guess was wrong.

There is something else that changes the paper size _back_ to letter size from A4 because this happens to me quite often.