http://userstyles.org/styles/43992/firefox-combine-tab-icon-and-tab-close-button For Firefox 3.6+ and up to the latest Firefox Beta, Aurora, Nightly builds. This style adds the following features: 1) Moves the "x"(tab close button) to the left of the tab. 2) Keeps the tab favicon on the left side of the tab and only makes "x"(tab close button) appear when you hover over the tab with your mouse cur