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Mar 29, 2016 · If not responding occurs, whilst the Windows OS is still in Safe Mode with Networking, restart Thunderbird in SAfe Mode. Repeat observation on when 'not responding' occurs. Report back on results. Please post the following information: In thunderbird: Help > TRoubleshooting Information click on 'Copy text to clipboard' button
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Some Mozilla Thunderbird users have noticed an issue where Thunderbird appears to freeze—it's not responding or starting up even though it appears to be running. Thunderbird usually returns the error message:
Thunderbird is already running, but not responding. To open a new window, you must close the existing Thunderbird process or restart your system.
Often, closing Thunderbird returns this additional error:
Your Thunderbird profile cannot be loaded. It may be missing or inaccessible.
If you have these problems, here's what might be happening and what you can do to fix these issues.
If Thunderbird refuses to start and returns an error about an existing Thunderbird process, it's because Thunderbird thinks your profile is in use. The cause might be a stale profile lock that was left after Thunderbird crashed. This means Thunderbird didn't close properly or correctly clean up temporary files. Additional processes are running in the background and Thunderbird is confused, frozen, and unable to open.
Another cause might be that Thunderbird is running on another computer. Thunderbird can't run on more than one computer at the same time with the same profile.
If Thunderbird is running but not responding, or it's saying that your profile is in use, here are the steps you should try.
1.Close and reopen Thunderbird. It's always worth a try to close the application and then reopen it. Select Thunderbird > Quit Thunderbird from the menu, and then reopen the application to see if this solves the problem.
2.Close Thunderbird on another computer. If Thunderbird is running with your profile on another computer, close Thunderbird on that machine by selecting Thunderbird > Quit Thunderbird from the menu. Then log in again on the computer you're using.
3.Kill Thunderbird's background processes. Even if you closed Thunderbird, the application might be running in the background. Ending Thunderbird processes that are running in the background might fix the issue. On a Windows system, do this from the Task Manager.
With macOS, force quit all Thunderbird processes from the Activity Monitor. On a Unix system, use the killall -9 thunderbird command in a terminal.
4.Restart the computer. Restarting is an easy fix that often solves many technical issues.
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Oct 24, 2023 · Users may face Mozilla Thunderbird freezing, not responding, crashing, or hanging due to configurations or other systematic issues. These issues can be quickly resolved in the following ways. How to Fix 1. Update Thunderbird. Quite often, an outdated Thunderbird version causes issues, and Thunderbird may freeze on Windows 11.
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Nov 14, 2021 · Enabling the “Allow Windows Search to search messages” option. Check to see if Mozilla Thunderbird still displays the ‘not responding’ message. Note: It might be useful to navigate to Advanced >> Network & Disc Space and uncheck the Automatic Compact option.
Jan 23, 2024 · Mozilla Thunderbird not responding can be attributed to various factors, each capable of disrupting the smooth operation of this email client. Understanding these potential causes is essential for effectively troubleshooting the issue. Here are some common reasons why Mozilla Thunderbird may become unresponsive:
