Firefox web browser

Removing horizontal tabs

When installing Tree Style Tab, there is no option to remove the horizontal tabs, but that can be done by adding following lines in the chrome/userChrome.css in your profile directory (type about:support in Firefox):

#TabsToolbar {
    visibility: collapse;
}

If the file does not exist, create it and put following line at the bottom (seems not to be required):

@namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul");