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Receiving this msg when opening email "Javascript application active window is null " SOLVED: caused by adblocker addon

  • 4 replies
  • 2 have this problem
  • 2 views
  • Last reply by captlee

Ingnz
Ingnz
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receive the above message when opening email or changing folder.

upgraded to version 45.5.1 and updated java but no change still getting error.

receive the above message when opening email or changing folder. upgraded to version 45.5.1 and updated java but no change still getting error.
Attached screenshots

Modified by Wayne Mery

Chosen solution

I restarted normally and got the error message again. went to tools/addons and disabled adblocker and all is good.

Thanks for your help.

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All Replies (4)

Wayne Mery
Wayne Mery
  • Moderator
  • Top 10 Contributor
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java isn't used by Thunderbird, so updating java would not help. TB does however use javascript.

Please start thunderbird in safe mode - https://support.mozilla.org/kb/safe-mode-thunderbird

Does problem go away?

Ingnz
Ingnz Question owner
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Yes it did 2 addons where disabled.

Ingnz
Ingnz Question owner
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Chosen Solution

I restarted normally and got the error message again. went to tools/addons and disabled adblocker and all is good.

Thanks for your help.

captlee
captlee
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It appears to have been an ad-on.... I was not aware that the add-ons for Firefox and TB were separate...... Thanks to all....