This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

T-bird unstable after adding theme. How can I get rid of remainder of theme?

  • 4 replies
  • 2 have this problem
  • 6 views
  • Last reply by ciscokid2

more options

I downloaded and installed a theme, After restarting, Thunderbird became extremely unstable, displaying just bits and pieces on my laptop screen. I tried uninstalling Thunderbird and then downloaded and installed the latest version. This did not help. After many attempts at closing and restarting, I was able to get enough displayed to run it in safe mode. I enabled the default theme, which helped the fix the instability problem. However, remnants of the downloaded theme still appear. How do I restore Thunderbird to its standard themes?

I downloaded and installed a theme, After restarting, Thunderbird became extremely unstable, displaying just bits and pieces on my laptop screen. I tried uninstalling Thunderbird and then downloaded and installed the latest version. This did not help. After many attempts at closing and restarting, I was able to get enough displayed to run it in safe mode. I enabled the default theme, which helped the fix the instability problem. However, remnants of the downloaded theme still appear. How do I restore Thunderbird to its standard themes?
Attached screenshots

Chosen solution

According to the FAQ, you should delete the Monterail xpi files while TB is running:

https://addons.thunderbird.net/en-us/thunderbird/addon/monterail-dark-2-0-for-tb-68/

Read this answer in context 👍 1

All Replies (4)

more options

Chosen Solution

According to the FAQ, you should delete the Monterail xpi files while TB is running:

https://addons.thunderbird.net/en-us/thunderbird/addon/monterail-dark-2-0-for-tb-68/

more options

Thank you very much!

There were two Monterail xpi files and two xpi files with random alpha/numeric file names. I had to delete all four to make the fix. I didn't find anything related when I searched the FAQs...probably due to not wording my search phrases well enough.

Again...thanks much!!!

more options

I'm not sure about the one beginning with d5e, but e2fda... is the Lightning extension, which you'll need for calendar functions.

more options

Right you are! I was so excited about the theme fix, I didn't notice Lightning was gone! Re-installed Lightning and all is now well.

Thanks again!!!