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

Lolu chungechunge lwabekwa kunqolobane. Uyacelwa ubuze umbuzo omusha uma udinga usizo.

Lightning download for Thunderbird 52.9.1 corrupt and won't install

more options

I recently upgraded to Thunderbird 52.9.1. Upon re-start the Lightning Calendar was no longer present. I went through the usual AddOn process and attempted to download the latest version of Lightning, several times. Each time I received a message that the addon could not be installed because it appeared to be corrupt. How do I get a good version so I can get my calendar back?

I recently upgraded to Thunderbird 52.9.1. Upon re-start the Lightning Calendar was no longer present. I went through the usual AddOn process and attempted to download the latest version of Lightning, several times. Each time I received a message that the addon could not be installed because it appeared to be corrupt. How do I get a good version so I can get my calendar back?

All Replies (2)

more options

Isisombululo Esikhethiwe

more options

Thanks for your help -- worked as advertised and easy to do.