Configure your antivirus program to exclude the Thunderbird Mail folders from being scanned. Go To Preferences → Advanced → General tab and disable the Global search.Īntivirus scanning of the Email folders in the filesystemĪ antivirus scanner can slow down Thunderbird as well. If you have folders with many emails inside, Indexing can slow down Thunderbird. Install the 'NoGlass' Addon which is available in the Thunderbird addon repository. If it is still slow, try the next options:ĭisabling the AeroGlass interface makes the interface reacting much faster. The following steps helped me to speedup Thunderbird so that it got usable again.Įdit Thunderbird options under Preferences → Advanced → General tab, click on 'Advanced options' button and set these values:Īnd restart Thunderbird. No other applications on my System were slow and the notebook has afast harddisk and SSD, so this was not the problem.

Sometimes I could see the chars appearing slowly on the screen while I typed the email or it was impossible to drag & drop a email to a different folder because Thunderbird was stalled for 10-15 seconds. I've experienced that Thunderbird has gotten slower and slower on my Laptop, at last it was nearly unusable.

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