Close button shown trice with dark theme about vertical-tabs-reloaded HOT 6 CLOSED

I can reproduce that with VTR 0.5.0 using the dark theme (FF 45 on Linux).

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I can confirm this as well on my Fedora machine, but not on my Windows setup.
Seems to be Linux only.

This is a follow up problem of #26. I'm wondering if @Keith94 would be willing to look into that once again? 😄

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@Croydon Well I don't have a Linux environment to reproduce this in, so I'm not entirely sure how to fix it. I played around with -moz-image-region to get a specific image for the different attributes. Maybe it will work for the 100% DPI setting...

.tab-close-button {
    -moz-image-region: rect(0px, 20px, 20px, 0px) !important;
}
.tab-close-button:hover {
    -moz-image-region: rect(0px, 40px, 20px, 20px) !important;
}
.tab-close-button:active {
    -moz-image-region: rect(0px, 60px, 20px, 40px) !important;
}

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This file from the source code contains additional rules for the Windows theme's close buttons: https://github.com/mozilla/gecko-dev/blob/master/toolkit/themes/windows/global/global.css#L326-L396

The default Linux theme is apparently using background-image rather than list-style-image for its close buttons, for what it's worth.
https://github.com/mozilla/gecko-dev/blob/master/toolkit/themes/linux/global/global.css#L311-L326

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I can confirm that the style rules posted by @Keith94 fix the problem when added to the browser globally using stylish. 😄

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Fixed with the next update. Thank you all :)

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