Ghost tab

[RNiK]

Starting with recent versions of Firefox I sometimes notices a "ghost tab" in the browser.
Initially I ignored the problem but then it started to pop up more and more.
In the end I've done some debugging (Safe Mode, clean profile, disabled all the add-ons one by one) and in the end I found out it's ImageTweak that creates those tabs.
To reproduce the problem should be sufficient to open a bunch of different tabs and then switch between them using Ctrl-Tab. You should notice the ghots tab in the end.

By the way, this problem has been reported (not by me) by some user in the last review on AMO ==> https://addons.mozilla.org/it/firefox/addon/imagetweak/reviews/645634/

The problem has been also reported in the Mozillazine thread ==> http://forums.mozillazine.org/viewtopic.php?p=14029673#p14029673

[knoajp]

To avoid ghost tab, I use Stylish css below.
// but still some ghosty behaviour remains.

/* avoid GhostTab of ImageTweak's bug */
#tabbrowser-tabs tab.tabbrowser-tab{
opacity: 1.0 !important;
}
.tabbrowser-tab,
.tabbrowser-tab hbox,
.tabbrowser-tab toolbarbutton{
visibility:visible !important;
}
.tabbrowser-tab .tab-icon .tab-icon-image:not([fadein]),
.tabbrowser-tab label{
display: -moz-box !important;
}