2009-05-25

CSS @media for Firefox Stylish Add-in

In an earlier entry, I wrote about using the @media print rule in a CSS file to insert the value of URLs in the print version of a web page. If the webmaster of the site didn't provide this rule, can you still print the URLs?

If you are using the Firefox Stylish add-in, you can provide your own CSS file to apply to a web site. I tried this:

@namespace url(http://www.w3.org/1999/xhtml);

@-moz-document domain("www.gamedev.net") {
  @media print {
    a:after { content:" (" attr(href) ")"; }
  }
}

… but it didn't work. It seems that the Mozilla / Firefox @-moz-document rule doesn't allow @-rules within it (see the Mozilla links below).

If you move the @media print outside of @-moz-document rule, as below, then any page that you print will include URL strings in the output.

@namespace url(http://www.w3.org/1999/xhtml);

@-moz-document domain("www.gamedev.net") {}

@media print {
  a:after { content:" (" attr(href) ")"; }
}

The only way to manage this behaviour is to disable that stylesheet in Firefox's User Styles page of the Add-ons dialog.

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