There has recently been a change in where Thunderbird themes are stored. It only happened about a week or so ago. https://blog.mozilla.org/addons/2018/07/17/the-new-thunderbird-add-ons-site-is-now-live/ https://blog.mozilla.org/addons/2018/07/10/new-site-for-thunderbird-and-seamonkey-add-ons/

Thank you for the information. Can you please guide me as to how to add them to Thunderbird after going to the new correct link? When I click "Add to Thunderbird" from Firefox, it adds the next theme to my browser theme. When I try the link from another browser, I get an error message, "We're sorry. We can't find what you're looking for."

can't install themes either - OSX and Windows 10 both fail (in different ways)

For lightweight themes, or personas, see this post:

https://support.mozilla.org/en-US/questions/1226464#answer-1136519

For full themes, download the xpi installer with Firefox and install in TB:

https://support.mozilla.org/en-US/kb/installing-addon-thunderbird

thanks for your message

I solved the problem by installing eM Client

life is too short for this [REMOVED]

[REMOVED] Mozilla

The addons site manager has been working on this

I have same problems used to be able to just add it now cant even highlighted it

davelang68 said

thanks for your message I solved the problem by installing eM Client life is too short for this [REMOVED] [REMOVED] Mozilla

Hi, be more friendly with your colleagues, we are all volunteers with the same purpose, helping others.

Thank you for your understanding!