Noté 5 sur 5 étoiles

Worked perfectly before Firefox 29, now it still works, but as Firefox no longer seems to take browser.tabs.tabClipWidth into account, there are no close buttons if the tab width is below 140px(the default), even if usually they are. A workaround for this is to use stylish or userChrome.css to set this:

.tabbrowser-tab .tab-close-button{display: block !important;}