This one worked across different browsers (assuming that you applied #4 first).
I can see an error in the logs on Chromium and Opera, but it worked nevertheless.
If you don't want to open a tab (which would work likely in Firefox for Android as well), it's easily changed to opening a window (aka popup. The annoying ones you may know from the past century).
The design is missing, so that would be the next step :-)
This one worked across different browsers (assuming that you applied #4 first). I can see an error in the logs on Chromium and Opera, but it worked nevertheless.
If you don't want to open a tab (which would work likely in Firefox for Android as well), it's easily changed to opening a window (aka popup. The annoying ones you may know from the past century).
The design is missing, so that would be the next step :-)