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--user-data-dir=DIR
              Specifies the directory that user data (your "profile") 
+is kept  in.   Defaults  to
              ~/.config/chromium  .   Separate  instances of Chromium 
+must use separate user data
              directories; repeated  invocations  of  chromium-browser
+  will  reuse  an  existing
              process for a given user data directory.

profile
profile => '/path/to/profile/directory'  #  set the profile directory
...
data_directory
data_directory => '/path/to/data/directory'  #  set the data directory
By default, the current data directory is used. Use this setting to ch
+ange the base data directory for the browsing session.