The prefs.js & user.js files in the Firefox Profile are where the
printer settings should be stored, just make sure the Firefox clients
are closed when making edits as settings are cached & saved upon closing
mozilla apps. There have been many mozilla bugs filed over the years
about persistent printer settings (windows & linux print driver
incompatibility), duplex is another print option that may need to be
reset often. http://kb.mozillazine.org/Prefs.js_file
https://wiki.mozilla.org/Firefox:Printing_and_Page_Setup

More information on FF3 changes to profiles, settings and migrating
bookmark.html & bookmarks-(date).json using sql-lite can be found here:
http://kb.mozillazine.org/Transferring_data_to_a_new_profile_-_Firefox

-HTH Art@JAX

Franchisseur Robert wrote:
> -- Le (On) 2008-11-05 -0600 à (at) 15:22:06 Troy Dawson écrivit (wrote): --
>
>   
>> Things changed alot with Firefox 3.
>> You'll probably also notice that it doesn't use the bookmarks.html file 
>> anymore, and a wide variety of things.
>> I personally don't know where it puts personal printing options.  Have 
>> you looked at through the mozilla website yet?
>>     
>
>        The  only way I find to permanently change options about paper
>        format  margin and so on was to do that in "about:config"  URL
>        as  those variables changed from the menus (print, page setup)
>        vanished.
>
>        No problem with A4 paper format till now.
>
>
>   
>> Troy
>>
>> [log in to unmask] wrote:
>>     
>>> Printing from firefox 3 for us is not reading in
>>> customisations users have made to their printer
>>> settings stored in their $HOME/.cups/lpoptions (or
>>> $HOME/.lpoptions) file. This is not the case for firefox 2.
>>> You can pick the options you desire from the firefox
>>> print dialogue box, but you have to do it everytime
>>> you go to print which for us is particularly annoying as
>>> everyone has their own photocopier printing code.
>>>
>>> It's the same behavior with the firefox 3 download from
>>> the mozilla site as well as the SL firefox rpm.
>>>
>>> In the terminal window when choosing to print we get
>>> the error message:-
>>>    (Gecko:20184): Gtk-WARNING **: Unknown paper size A4
>>>
>>> I'm just wondering if others are experiencing this?
>>>
>>> cheers,
>>> Ronnie
>>>       
>> -- 
>> __________________________________________________
>> Troy Dawson  [log in to unmask]  (630)840-6468
>> Fermilab  ComputingDivision/CSS  CSI Group
>> __________________________________________________
>>     
>
>