E: Some index files failed to download, they have been ignored, or old ones used instead. hakon@hakon-laptop:~$ sudo apt-get install chromium-browser Reading package lists… Done Building dependency tree Reading state information… Done You might want to run ‘apt-get -f install’ to correct these: The following packages have unmet dependencies. chromium-browser: Depends: chromium-codecs-ffmpeg but it is not going to be installed or chromium-codecs-ffmpeg-nonfree but it is not going to be...