Firefox by default already does almost all of these (Language, new tabs instead of windows, built in PDF reader, etc.) If you want to deploy additional settings, http://mike.kaply.com/cck2/ might be able to help.

Thanks for the prompt response! I found the PDF reader IS a default; excellent news.

I experimented a little with CCK2. While I can set the home page, CCK2 doesn't have everything. Or rather, some solutions are not obvious:

1) The interface for setting the default search engine is buggy; I cannot seem to use Google in another language. 2) I cannot set the language of Firefox. 3) An option for toggling "new tabs by default" does not exist. I can only find it in my Mac's "Preferences Pane", not even in about:config.

I should clarify that Firefox will be installed on computers at a computer lab in a different country. Assume the national language of the country is NOT English (though the users will be using English Firefox). The ideal solution would package up a custom Firefox into a single file (with all the above modifications) that can be downloaded and installed. A less ideal solution would be a list of files need to be modified and their locations - along with instructions for modification.

Please contact Mike Kaply for assistance with CCK2.

For the language issue, just make sure you use an English US build of Firefox: https://www.mozilla.org/en-US/firefox/all/

Thanks! Upon toying around with CCK2 a bit, that turned out to be the solution I was looking for; it actually had everything I needed.

I also didn't realize that the variable for "new tabs by default" is browser.link.open_newwindow .