Ideally, if all of the CSS files used should be defined in the theme's .info file, how would I go about using different CSS files for different browsers?

3 Answers 3


The Conditional Stylesheets module allows themes to easily add conditional stylesheets to a theme's .info file.

This module is already used by the Zen, Layout Studio, and Tendu themes.


Put this in your info file

  ; Set the conditional stylesheets that are processed by IE.
  conditional-stylesheets[if IE][all][]       = css/ie.css
  conditional-stylesheets[if lte IE 6][all][] = css/ie6.css

This is taken directly from the Zen theme for Drupal 6.

  • OK thanks, but do I need to download a module in order for this code to work?
    – Jane
    Commented Aug 12, 2011 at 19:47
  • Yes I think you have to download the module to use the above code -- many thanks to both of the people who replied!
    – Jane
    Commented Aug 12, 2011 at 20:16
  • Nope. Just put this code in your theme folder. I suggest you download the Zen theme and make a sub-theme because there is a TON of instructions in the readme.txt files that will explain this for you.
    – nmillin
    Commented Aug 12, 2011 at 20:22
  • The Zen theme is using the Conditional Stylesheets module, as reported in keithm's answer.
    – avpaderno
    Commented Mar 1, 2012 at 17:58

You could use the CSS Browser Selector module which allows you to write cross-browser CSS using selectors like .ie7, .ie, .ff, .safari, etc.

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