The newest Chromium in Debian sid disables remote extension loading by default. This has the effect of disabling extensions en masse. I'm not sure what the reasoning is, but it's damn inconvenient.
It's claimed that one way to get the old behavior back is to add
to the list of flags in
/etc/chromium.d/default-flags. This will affect all users on the system, and the file could be overwritten by an upgrade. In addition, until I know better what's behind the change, I'd really like to apply the change only to my account, not to all users.
I did this by adding:
# fix latest Debian Chromium disabling remote extensions export CHROMIUM_FLAGS=$CHROMIUM_FLAGS" --enable-remote-extensions"
~/.profile. Be sure to log out and back in to experience the change.