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Why is UNDO CLOSED TAB disabled by default?

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  • 1 有這個問題
  • 2 次檢視
  • 最近回覆由 CoryMH

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Whenever my browser is updated, the UNDO CLOSED TAB is disabled by default. At that time, I need to go to about:config to enable them.

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Hello,

Please see the article How to fix preferences that won't save.

You may have a user.js file setting that preference each time you start up Firefox. Information on how to remove it is in the article above, or more specifically this section:

If you have no user'js file, the article shows other possible reasons why the preference keeps getting reset.