KDE is an entire desktop environment, with a bunch of applications and even partnerships that have yielded a KDE laptop. Should Thunderbird have been able to collect more money than KDE itself, there might be something that KDE can learn from Thunderbird.
Yeah that's a fair point. I'm currently using kubuntu and enjoy it more than other distros I've tried. But I've never felt a strong desire to adopt all the tools. It took me a long while to realize that the themes store is more or less dead and theme authors expect you to install a 3rd party tool (Kvantum) to get the real theme. I wish they would make that more obvious, cause when you're browsing themes in KDE none of that is obvious and you left wondering why it didn't do much.
That is strange. It is resizing for me depending on the payment option I choose, showing all the info without the need of scrolling. I am using the desktop version of Firefox.