Monday, May 10, 2010

Show close button on the last tab in Firefox 3.5+

In Firefox versions 3.5 and later the close button is not displayed on the last tab. If you try to close the last tab by pressing Ctrl+W then Firefox closes with the tab. Sometimes, this can be annoying, so here is a simple fix for the problem.
  • Open a new tab in Firefox and enter about:config as the URL.
  • Click "I'll be careful, I promise!" button to get to the config page.
  • Make the following changes in the config page:

    • browser.tabs.closeButtons = 1
    • browser.tabs.closeWindowWithLastTab = false
  • Close Firefox.
  • Goto folder %APPDATA%\Mozilla\Firefox\Profiles\xxxxxxxx.default\chrome

    •  %APPDATA% == C:\Documents and Settings\\Application Data\ folder in Windows XP
    • %APPDATA% == C:\Users\\AppData\Roaming\ folder in Windows Vista and 7
    • More details on where the Firefox Profiles folder is located in different Operating Systems can be found at
  • Open userChrome.css in a text editor such as Notepad++ or Windows Notepad.
  • Add the following code to userChrome.css

    /* Add tab-close-button to last tab*/
    .tabbrowser-tabs[closebuttons="alltabs"] > 
     .tabbrowser-tab > .tab-close-button {
      display: -moz-box !important;
    .tabbrowser-tabs:not([closebuttons="noclose"]):not([closebuttons="closeatend"]) > 
     .tabbrowser-tab[selected="true"] > .tab-close-button {
      display: -moz-box !important;
  • Save userChrome.css
  • Open Firefox and you should have a close button displayed on the last tab.

1 comment:

Anonymous said...

thanks !

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