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This preference determines how to handle middle clicks in text fields.

Possible values and their effects


Paste the contents of the clipboard into the text field. (Default for Linux/Unix.)


Perform the action specified by middlemouse.contentLoadURL. (Default for all but Linux/Unix.)


Previous effects

This preference used to also handle middle clicks in the content area outside of text fields. middlemouse.contentLoadURL now handles these clicks.

First checked in

2001-03-13 by Akkana Peck.

Has an effect in

  • Netscape (all versions since 6.0)
  • Mozilla Suite (all versions since M15)
  • Mozilla Phoenix (all versions)
  • Mozilla Firebird (all versions)
  • Mozilla Firefox (all versions)
  • Mozilla Thunderbird (all versions)
  • SeaMonkey (all versions)

Related bugs

Related preferences