How to enable extensions in Chromium Version 55.0.2883.75

OS: Debian Stretch
Chromium version: 55.0.2883.75

Problem:
After updated to above version, Chromium disabled all the extensions installed before with below notice:

* External extensions are now disabled by default.  Chromium will only load
    extensions that are explicitly specified with the --load-extension command
    line option passed into CHROMIUM_FLAGS.  See the chromium-lwn4chrome
    package for an example of how to do this.
  * You can also use the --enable-remote-extensions command line argument to
    chromium, which will bypass this restriction.

Solution:
Add '--enable-remote-extensions' into default-flags configure file. Add one more line as following:
$ sudo gedit /etc/chromium.d/default-flags


export CHROMIUM_FLAGS="$CHROMIUM_FLAGS --enable-remote-extensions"