Update the UserChromeJS extension

Oct 13, 2025 by wbrum.org 71 views

Thunderbird Daily (138.0a1) Compatibility Issues with UserChromeJS

Introduction

As a user of Thunderbird Daily (138.0a1), you may have encountered issues with the UserChromeJS extension. This article aims to provide a detailed explanation of the compatibility issues and potential solutions to get your UserChromeJS working smoothly on the latest Thunderbird Daily version.

Understanding the Issue

The error message you're encountering suggests that the UserChromeJS extension is trying to use the ChromeUtils.import function, which is not available in the latest Thunderbird Daily version. This is a known issue, and the developer of UserChromeJS has made changes to address this compatibility problem.

Changes to UserChromeJS for Thunderbird Daily Compatibility

The developer of UserChromeJS has made a non-functional change to convert ChromeUtils.import to ChromeUtils.importESModule for compatibility with upcoming Thunderbird releases. However, it seems that this change is not sufficient to resolve the issue on Thunderbird Daily (138.0a1).

Modifying the Manifest File

To troubleshoot the issue, you've modified the manifest file to allow a maximum version of 138.*. This change is intended to enable the UserChromeJS extension to work on the latest Thunderbird Daily version. However, the error message suggests that there's still a compatibility issue.

Error Message Analysis

The error message you're encountering is:

19:29:41.375 1741562981374	addons.xpi	WARN	Exception running bootstrap method startup on userChromeJS@kamens.us: TypeError: ChromeUtils.import is not a function(jar:file:///C:/Users/XXX/AppData/Roaming/thunderbird/Profiles/2b2wch1z.default-nightly/extensions/userChromeJS@kamens.us.xpi!/experiments.js:3:40) JS Stack trace: @jar:file:///C:/Users/XXX/AppData/Roaming/thunderbird/Profiles/2b2wch1z.default-nightly/extensions/userChromeJS@kamens.us.xpi!/experiments.js:3:40
asyncLoadModule/module.asyncLoaded<@ExtensionCommon.sys.mjs:1798:16 2

This error message indicates that the UserChromeJS extension is trying to use the ChromeUtils.import function, which is not available in the latest Thunderbird Daily version.

Potential Solutions

Based on the analysis of the error message, there are a few potential solutions to resolve the compatibility issue:

Update the UserChromeJS extension: Make sure you're using the latest version of the UserChromeJS extension. The developer may have made additional changes to address the compatibility issue.
Modify the UserChromeJS code: You can try modifying the UserChromeJS code to use the ChromeUtils.importESModule function instead of ChromeUtils.import. This may require some technical expertise and knowledge of JavaScript.
Disable the UserChromeJS extension: If none of the above solutions work, you can try disabling the UserChromeJS extension and see if it resolves the issue.

Conclusion

In conclusion, the compatibility issue with UserChromeJS on Thunderbird Daily (138.0a1) is a known problem that requires a solution. By analyzing the error message and understanding the changes made to the UserChromeJS extension, you can try the potential solutions outlined above to resolve the issue.

Additional Resources

Troubleshooting Tips

Make sure you're using the latest version of the UserChromeJS extension.
Check the UserChromeJS code for any references to ChromeUtils.import and modify it to use ChromeUtils.importESModule instead.
Disable the UserChromeJS extension and see if it resolves the issue.
Try resetting the Thunderbird Daily profile to its default settings.

FAQs

Q: What is the UserChromeJS extension? A: The UserChromeJS extension is a popular add-on for Thunderbird that allows users to customize the browser's UI and behavior.
Q: Why is the UserChromeJS extension not working on Thunderbird Daily (138.0a1)? A: The UserChromeJS extension is not working on Thunderbird Daily (138.0a1) due to a compatibility issue with the latest version of the browser.
Q: How can I resolve the compatibility issue? A: You can try updating the UserChromeJS extension, modifying the UserChromeJS code, or disabling the extension to resolve the issue.
Thunderbird Daily (138.0a1) Compatibility Issues with UserChromeJS: Q&A

Introduction

As a user of Thunderbird Daily (138.0a1), you may have encountered issues with the UserChromeJS extension. This Q&A article aims to provide answers to frequently asked questions and help you troubleshoot the compatibility issue.

Q: What is the UserChromeJS extension?

A: The UserChromeJS extension is a popular add-on for Thunderbird that allows users to customize the browser's UI and behavior. It provides a wide range of features, including customizing the toolbar, changing the font and color scheme, and adding new buttons and menus.

Q: Why is the UserChromeJS extension not working on Thunderbird Daily (138.0a1)?

A: The UserChromeJS extension is not working on Thunderbird Daily (138.0a1) due to a compatibility issue with the latest version of the browser. The issue is caused by the fact that the extension is trying to use the ChromeUtils.import function, which is not available in the latest Thunderbird Daily version.

Q: How can I resolve the compatibility issue?

A: You can try updating the UserChromeJS extension, modifying the UserChromeJS code, or disabling the extension to resolve the issue. Here are some steps you can follow:

Update the UserChromeJS extension: Make sure you're using the latest version of the UserChromeJS extension. The developer may have made additional changes to address the compatibility issue.
Modify the UserChromeJS code: You can try modifying the UserChromeJS code to use the ChromeUtils.importESModule function instead of ChromeUtils.import. This may require some technical expertise and knowledge of JavaScript.
Disable the UserChromeJS extension: If none of the above solutions work, you can try disabling the UserChromeJS extension and see if it resolves the issue.

Q: What are the benefits of using the UserChromeJS extension?

A: The UserChromeJS extension provides a wide range of benefits, including:

Customizing the toolbar and changing the font and color scheme
Adding new buttons and menus
Changing the behavior of the browser
Improving the overall user experience

Q: Are there any alternatives to the UserChromeJS extension?

A: Yes, there are several alternatives to the UserChromeJS extension that you can use to customize your Thunderbird browser. Some popular alternatives include:

Stylish: A popular add-on that allows you to customize the appearance of your browser
User Styles: A collection of user-created styles that you can apply to your browser
Custom CSS: A feature that allows you to write custom CSS code to customize your browser

Q: How can I get help with the UserChromeJS extension?

A: If you're experiencing issues with the UserChromeJS extension, you can try the following:

Check the UserChromeJS documentation: The UserChromeJS documentation provides a wealth of information on how to use the extension and troubleshoot common issues.
Visit the UserChromeJS forum: The UserChromeJS forum is a great place to ask questions and get help from other users.
Contact the UserChromeJS developer: If you're experiencing a critical issue, you can try contacting the UserChromeJS developer directly.

Q: What is the future of the UserChromeJS extension?

A: The future of the UserChromeJS extension is uncertain. The developer has made changes to address the compatibility issue, but it's unclear whether the extension will continue to work on future versions of Thunderbird.

Q: Can I contribute to the UserChromeJS extension?

A: Yes, you can contribute to the UserChromeJS extension by reporting bugs, suggesting new features, or writing code to fix issues. The UserChromeJS developer is always looking for help and contributions.

Q: How can I stay up-to-date with the latest news and updates on the UserChromeJS extension?

A: You can stay up-to-date with the latest news and updates on the UserChromeJS extension by:

Visiting the UserChromeJS website: The UserChromeJS website provides the latest news and updates on the extension.
Following the UserChromeJS developer on social media: The UserChromeJS developer is active on social media and often posts updates and news about the extension.
Subscribing to the UserChromeJS newsletter: The UserChromeJS newsletter provides regular updates and news about the extension.