Whenever I click to close a tab, the page remains, and when I select another tab, I cannot return the tab to focus, nor can I close it out. Apparently the tab is "closed" but it is also still "open"; the tab still lingers on the tab bar after clicking the close button on the tab. When I go to click the tab after I've clicked another unclosed tab adjacent to it, it selects the tab to its right, unless it's the last tab. Sometimes it appears as though it is indefinitely loading the page it was on. I've found that I can only clear these bugged-up tabs for a short while after restarting Firefox. I am also running this on Ubuntu 10.04 LTS. '''Edit:''' After restarting I am able to close the tabs, as they've remained open after closing the browser; however new tabs that I've opened afterwards continue to suffer the bug. Furthermore, when a tab has bugged up in the way I mentioned, right-clicking and selecting "Undo Close Tab" brings back the "closed" tab in a new tab, which I can close, but does not close the stuck tab. Also, in Panorama mode, I found that I can switch back to these buggy tabs, but I still cannot close them, and if I click away from them, I cannot return to them, unless I switch to them in Panorama. I also cannot close them in Panorama mode. however, I can drag them into a new tab group, but this doesn't solve the problem much, especially considering that other open tabs continue to not-close.