MozillaZine newwindow.restriction

From MozillaZine Knowledge Base



Some web sites choose to open certain links in new windows. However, many users prefer using tabs to multiple browser windows. This preference allows for fine-tuning of

Oftentimes when a new window is opened from JavaScript, it’s a small popup without all of a usual browser window’s features—e.g., the back/forward/reload buttons are hidden, the status bar is hidden, the size is purposely smaller, etc. Usually in this situation, the window is designed specifically as a popup, and opening it in a tab actually makes it less useful. This preference can let these types of links open as new windows while opening all other types as new tabs.

Possible values and their effects


Divert all links according to (Default in Firefox 1.0.x and SeaMonkey 1.0 to 2.1a2)

This includes:

  • All HTML links with target="_blank".
  • All JavaScript calls to


Do not divert any links ( will have no effect).


Divert all links according to, unless the new window specifies how it should be displayed. (Default in Firefox 1.5 and later, in SeaMonkey 2.1a3 and later, and Camino 1.5)

This includes:

  • All links with target="_blank".
  • JavaScript calls to without the "features" parameter (3rd parameter).

This does not include:

  • JavaScript calls to with the "features" parameter (3rd parameter).

First checked in

Has an effect in

  • Mozilla Firefox (all versions since 1.0RC1)
  • SeaMonkey (all versions)
  • Camino (1.1a1 and newer)

Related bugs

Related preferences