In Adobe Acrobat or acroread, when I click on a link in a PDF file I get the error: 'Web Browser has not been specified. Do you want to configure the Weblink Preferences?'

This error mean that the application does not know what your web browser is. This is preventing the application from opening up the html document.

To fix this error you can do either of the following:
  1. When the question comes up, click on Yes.
    In the field underneath 'Web Browser Application', type /usr/bin/mozilla
    Then click on OK
  2. Click on Edit->Preferences->Web Link
    In the field underneath 'Web Browser Application', type /usr/bin/mozilla
    Then click on OK
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