my life

If you’re like me and have massive folders over IMAP, it’s likely that when Thunderbird polls them that it thinks the imap server has stopped responding. In reality, it’s still just processing your request. The error is usually “A script on this page may be busy, or it may have stopped responding. You can stop the script now, or you can continue to see if the script will complete”. This sensitivity of this timer can be adjusted by editing dom.max_script_run_time.

The dom.max_script_run_time preference defaults to 5 seconds in Thunderbird 1.5. Try increasing it to 30 seconds using Tools -> Options -> Advanced -> General -> Config editor