Opening links in KDE (within in the apps Korganizer, and Kitty)

I’m new to KDE Plasma, having just installed ubuntu-studio on my machine a few weeks ago, and I’m trying to configure a few of the applications
that I use.

In them I’ve noticed that the links do not open in the browser but instead are re-directed to an application called ‘QPrompt’.

I’ve searched this a bit and can say that it’s likely the cause of setting surrounding mime-type. Threads on stackoverflow seem to suggest others having similar issues. With me I use xdg-mime query default text/html
and get com.cuperino.qprompt.desktop, which similar searches suggested on stackoverflow xdg-mime query default x-scheme-handler/https exits with status 1 in my zsh shell.

Hi - what do you see when you go to System Settings > Default Applications and look at the “Web browser” selection at the top? Example of that screen below:

This is the system settings app. As you can see there is the word “Other” in the browser, and when I click on it there isn’t any option for ‘Firefox’ in the dropdown menu.

I found that you can click on ‘Other …’ and another window appears but this new window doesn’t contain a firefox app either.

If it were here it would be under the category internet, or so I would think.

I was able to find a solution to not having the app itself posted with an icon in the listings of the ‘Choose Applications’ window, as much as I would like to have seen it there.

The solution was in clicking the ‘Browse’ icon button:

After that I typed out the address for firefox, which is /usr/bin/firefox on my system, and although I don’t have the fancy icon in the menu, I do get the behaviour I was looking for with applications opening links as I would have expected them to.