@dchalbert Right, this is done by postinst script in .deb packages. Reported issue for this to be fixed.

@nneo16 Thanks very much for the info.

Your sources.list doesn't look too good. In any case your sources for opera are disabled:

# Para instalar Opera Browser #deb https://deb.opera.com/opera-stable/ stable non-free # deb-src https://deb.opera.com/opera-stable/ stable non-free

Please read the thread in my signature. It answers every single question you have, including the why you should NOT install something made for another distro.

Debian testing x64 user.