Installer la dernière version de Firefox sur Stretch ?

Support Debian
42 

@debian:~/.local/share/applications$ /usr/lib/firefox/firefox -private-window -p firefox57
ATTENTION: default value of option force_s3tc_enable overridden by environment.
ATTENTION: default value of option force_s3tc_enable overridden by environment

Nickel

@debian:~/$ /opt/firefox/firefox -private-window -p beta

Et tout aussi nickel :grinning: