plus access to the experimental netlabs.org repository.
Anything more to add?
There's a few other supporting packages. Off the top of my head, ffmpeg-libs and the newest ICU, both also need the corresponding legacy libs packages installed as well for older software such as Firefox. There's more which I can't remember right now.
The problem right now is that it is all under active development. I watch some of the issue trackers and it is not uncommon for other packages to need updates to fix the simple browser's test suite.
This is the problem with a Qt5 runtime package or even a readme listing all the needed packages, currently it is in a state of flux, so a readme might need frequent updating, likewise with a runtime package. Went through this with Firefox, it just became harder and harder to keep up with the packages as they keep changing. Even now things like ffmpeg-libs needs changing to ffmpeg-legacy-libs or such. ICU too. Then there are packages that
should work but make the browser crash such as the updated NSPR4 and NSS packages, where the simplest might be to copy the older DLLs into the program directory.