Windows – How to run chrome in app mode without window frame

Exit Chrome, navigate to your User Data folder (eg C:\Users\IanN\AppData\Local\Google\Chrome\User Data\Default), then open the file Preferences and look for the following section

"browser": {
   .
   . <there will likely be a few sections here>
   .
   "window_placement": {
      "bottom": 1149,
      "left": 0,
      "maximized": false,
      "right": 1600,
      "top": 406,
      "work_area_bottom": 1149,
      "work_area_left": 0,
      "work_area_right": 1600,
      "work_area_top": 0
   },
   .
   .
   .
},…

Either adjust the number, or just delete the whole window_placement block—make sure to be careful not to delete other stuff; use the curly-braces as guides and make sure to match them. (Make a backup copy of the file, just in case.)

Now run Chrome. It should be displayed in the default location. If not, then you could delete the other window_placement_* blocks from Preferences and …\User Data\Local State (Local State is a file in the parent folder of Default.)

You should not change HKEY_CLASSES_ROOT (HKCR). This is simply a merged view from HKEY_CURRENT_USER\Software\Classes and HKEY_LOCAL_MACHINE\Software\Classes.

• If you wish to make a change that affects all users that can connect to the machine, use:

  HKEY_LOCAL_MACHINE\SOFTWARE\Classes\ChromeHTML\shell\open\command

• If you wish to make changes that affect only the current user, use:

  HKEY_CURRENT_USER\Software\Classes\ChromeHTML\shell\open\command

Note: Depending on how Chrome was installed, you may not see one of these; i.e. if it was installed just for the current user, "HKEY_LOCAL_MACHINE\SOFTWARE\Classes\ChromeHTML" will be missing). But You can move and copy from one key to the other if you want.

For more information: See Windows registry Information