Disable the Extension/Theme that is causing trouble and then start normally. When started in Safe Mode all extensions are disabled and the Default theme is used. Restart the email client in Safe Mode - select Help followed by Restart with Add-ons disabled. If you encounter strange problems relating to parts of the email client no longer working, the email client not starting, windows with strange or distorted appearance, degraded performance, etc, you may be suffering from Extension or Theme trouble. Poorly designed or incompatible extensions can cause problems with your email client, including make it crash, slow down message display, etc.There is a handy tool called ThunderFix to do that. A cleanup of these files can speedup Thunderbird as well, especially if some of them are broken.

Thunderbird creates a lot of index files. Warning: this option should only be used when the email is scanned by a smtp proxy of the antivirus program for viruses before it is handed to Thunderbird. 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.

Mozilla thunderbird for windows 7