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when i open several pages in firefox a number of icons appear in the task bar. when my mouse curser pauses there a list of open pages rolls up blocking dsktop

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when i open several pages in fire fox a number of icons appear in the task bar, one for each open page. that is the way i like it. when my mouse cursor pauses there, a list of open pages rolls up blocking my desktop. how do i disable this feature?

when i open several pages in fire fox a number of icons appear in the task bar, one for each open page. that is the way i like it. when my mouse cursor pauses there, a list of open pages rolls up blocking my desktop. how do i disable this feature?

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Options > Tabs: [X] "Show tab previews in the Windows taskbar"

Try to set pref(s) to false on the about:config page:

  • browser.taskbar.previews.enable = false
  • browser.taskbar.lists.enabled = false

You can open the about:config page via the location/address bar. You can accept the warning and click "I'll be careful" to continue.

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Thank you but... sorry, this did not stop the problem/feature.

 What is that roll up window shade thing called? 
 Can it be eliminated, slowed down,  reduced in size or made transparent? 
 Any help is appreciated. B.T.