The debian package downloaded from the site opens in the software center, but when install is clicked it does nothing.
Guys the question does not ask how to install on ubuntu 15.04. As you probably realize the procedure between implementations can easily differ. Also the question does not ask how to install debian packages in general. In the past my experience with this is that the general install mechanism does not pull dependencies, or has other tricky implementation details such as just use -f
... which in the past sometimes works, sometimes does not, and then we are back to the drawing board again, possibly having to reinstall the whole system in order to clean things up.
Context matters. The context here is Ubuntu 17.04 (64 bit) and Vivaldi. People coming to this forum want a tested proven answer in the context that they are requesting the answer for. Short simple and easy to implement answers.
This is probably the 5th time this month that I'm writing a long explanation in my post as to why something is not a duplicate. It will probably trigger something about going to meta to explain or challenge the duplicate tag. But seriously we just want quick short answers. Put a 3 day timing delay on marking things as duplicates and let people respond with answers that are specific to a given context. It will make the forum much better.