On Ubuntu 16.04 and 16.10 it’s recommended to install qutebrowser via tox instead in order to be able to use the new QtWebEngine backend.
Assuming, you are using one of above version.
$ git clone https://github.com/qutebrowser/qutebrowser.git
$ cd qutebrowser
$ tox -e mkvenv-pypi
$ vim /usr/local/bin/qutebrowser
#!/bin/bash
~/path/to/qutebrowser/.venv/bin/python3 -m qutebrowser "$@"
/path/to/qutebrowser/ is your current directory. pwd will show you that.
$ sudo chmod +x /usr/local/bin/qutebrowser
Now you can open qutebrowser like any other applications.