Windows 10 reached EOS (end of support) on October 14, 2025. If you are on Windows 10, see this article.

搜尋 Mozilla 技術支援網站

防止技術支援詐騙。我們絕對不會要求您撥打電話或發送簡訊,或是提供個人資訊。請用「回報濫用」功能回報可疑的行為。

了解更多

taskbar previews multiple blank listings

  • 2 回覆
  • 0 有這個問題
  • 142 次檢視
  • 最近回覆由 JQW

Three days ago this started happening. When I mouse over the Firefox icon on my task bar, I get a long vertical list of open tabs, the majority of which are blank. When you try to click the X (that appears on the right side of the list when you mouse over a blank space) nothing happens. In the past few days it showed a random mix of blank tabs and open tabs. Yesterday it only showed the open tabs at the top with a long list of blanks below. And today it's only showing the one tab I have active (despite having up to five tabs open before I took the picture).

Before this all started happening, it used to show large tab previews (not just text) that run horizontally along the bottom of my screen when I hover my mouse over the Firefox icon on the taskbar. Now it's just a list that goes vertically with all these blank tabs.

How to return things to normal? (tab previews horizontally without blanks)

I'm running Windows 11 Home, Version 25H2, OS build 26200.7623 and Firefox: 147.0.1 (64-bit)

Thank you, John

Three days ago this started happening. When I mouse over the Firefox icon on my task bar, I get a long vertical list of open tabs, the majority of which are blank. When you try to click the X (that appears on the right side of the list when you mouse over a blank space) nothing happens. In the past few days it showed a random mix of blank tabs and open tabs. Yesterday it only showed the open tabs at the top with a long list of blanks below. And today it's only showing the one tab I have active (despite having up to five tabs open before I took the picture). Before this all started happening, it used to show large tab previews (not just text) that run horizontally along the bottom of my screen when I hover my mouse over the Firefox icon on the taskbar. Now it's just a list that goes vertically with all these blank tabs. How to return things to normal? (tab previews horizontally without blanks) I'm running Windows 11 Home, Version 25H2, OS build 26200.7623 and Firefox: 147.0.1 (64-bit) Thank you, John
附加的畫面擷圖

被選擇的解決方法

I’ve seen this after recent Windows or Firefox updates. A full reboot plus resetting the taskbar thumbnail settings usually brings back the horizontal previews.

從原來的回覆中察看解決方案 👍 1

所有回覆 (2)

選擇的解決方法

I’ve seen this after recent Windows or Firefox updates. A full reboot plus resetting the taskbar thumbnail settings usually brings back the horizontal previews.

You are right! I just did a Windows reboot and it resolved itself. I thought it was a Firefox issue, and not a Windows issue so I had been starting and restarting Firefox and messing with the config settings. And Windows actually did do an update this week but I thought this issue was occurring before the update (and self-boot) so I didn't think another Windows reboot would work. But smh, yes, always try rebooting first when troubleshooting. Thanks!

由 JQW 於 修改

問個問題

如果您還沒有帳號,您必須先登入帳號 來回覆文章。還沒有帳號的話,只能發問新問題