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How to open new tab with mouse 3 instead of new window

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I used to be able to open new tabs simply by mouse 3 clicking on links. Now on Firefox 4 it opens a new window, and if I click multiple links, it opens this new window, and fills it with tabs. WHY? it makes no sense.

I want to be able to tab links on same window im currently surfing so i.e. Im reading some internet news, and I tab all interesting topics I want to read, but now it doesnt work because it keeps opening the new window.

Can anyone help how to change this behavior, in preferences menu it doesnt matter how i select tabs to behave.

I used to be able to open new tabs simply by mouse 3 clicking on links. Now on Firefox 4 it opens a new window, and if I click multiple links, it opens this new window, and fills it with tabs. WHY? it makes no sense. I want to be able to tab links on same window im currently surfing so i.e. Im reading some internet news, and I tab all interesting topics I want to read, but now it doesnt work because it keeps opening the new window. Can anyone help how to change this behavior, in preferences menu it doesnt matter how i select tabs to behave.

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There is a hidden configuration setting for how the middle click should behave. Yours must have been changed somehow. Try these steps to change it back to normal:

  1. Type about:config into the Location bar.
  2. Type browser.tabs.opentabfor.middleclick into the Filter text box on that page. There should then only be one preference listed, and yours should be set to false.
  3. Right-click on the preference and choose the Reset option.

Once you've done that, middle-clicking on a link should open it in a new tab. Hope that helps.

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Thanks for reply, but it suddenly works again. :S