I found this post: What is the difference between Preference and Secure Preference file in Google Chrome?
But I want to know further: When does Chrome decides to use Secure Preferences and when to use Preferences file for maintaining extensions?
Case 1:
Because I found that in my computer the newly installed extension's manifest.json file's whole content is copied to Preferences file. Which means Chrome uses Preferences file to maintain my extensions. In this case, my Secure Preferences file has only one line as below:
{"protection":{"super_mac":"abc123xxxxxxx"}}
In this case I can change my extension's configuration e.g. update_url (in the Preferences file) sucessfully.
Case 2: While in my colleague's computer the installed extension's manifest.json file's content is not copied to Perefences file, but it is copied to Secure Preferences file. Which means Chrome uses Secure Preferences file to maintain his extensions.
In this case I cannot change my extension's any configuration, otherwise will cause the browser to reset settings.
Why? What is the factor for Chrome to decide to use Preferences file or Secure Preferences file for maintaining the extensions?
More：
I found that all the Chrome browsers which are in our company domain use Preferences. And all the Chrome browsers which are not in our company domain use Secure Preferences. Both cases have nothing to do with whether the browser users login or not. But why?
