The programs now share a common library called “mozilla-kde-support” (replacing the former “firefox-kde-support”). It is recommended to update firefox-plasma first, then (if you wish) installing thunderbird-plasma by executing the following commands:
To get the latest versions, add the ppa:
sudo add-apt-repository ppa:plasmazilla/releases
and execute these commands:
sudo apt-get update
sudo apt-get install firefox-plasma
sudo apt-get install thunderbird-plasma
That should pull in all dependencies and also replace “firefox-kde-support” with the universal package.
If you experience any problems or get stuck, please write a comment below or use our forums, thanks.