Recently, I updated my Debian Linux installation using apt. After the updates, Google Chrome plugins stopped working. I got the error message “installation not enabled” when trying to install extensions. After some searching around, I found a fix.
Run:
sudo gedit /etc/environment
(or edit /etc/environment as root with your favorite editor)
And add the following lines:
CHROMIUM_FLAGS=’–enable-remote-extensions’
Logout and login again and Google Chrome extensions will work again.