Legacy Browser Support extension for Windows

Legacy Browser Support release notes

See the changelog below for the Legacy Browser Support (LBS) version history. We recommend you are using the latest version of the Legacy Browser Support MSI and Chrome extension.

Here's a list of the new features with each LBS release:


  1. Added new interoperability functions to the LBS extension. These are in anticipation for when Legacy Browser Support's functionality is incorporated into Chrome Browser in a future release. For more information, see "Legacy browser support planned to be incorporated into Chrome 75" in the Chrome Enterprise Release Notes.


  1. Fixed an issue with the AlternativeBrowserArguments and ChromeArguments policies not being applied in LBS.
  2. Fixed an issue with Internet Explorer site lists where whitespace around domain names was not properly trimmed.


  1. More precise rules in the URL lists make managing multiple sites hosted on the same domain simpler. Specifically, the more precise URL entries in any list are preferred over less precise ones.
  2. Improves support for automatically generated Internet Explorer site lists.
  3. Reminder: If you deploy the Legacy Browser Support MSI manually, make sure to download and deploy the newest version to avoid the MSI being out of date with the latest Chrome extension version.


  1. Always move Internet Explorer windows forward when launched from LBS.


  1. Added "Use IE Enterprise Mode site list if present" policy.
  2. Added "Show transition message for some time" policy.


  1. Fixed a bug where URLs could be cut in half when transitioning to IE.


  1. Disabled the extension in Incognito mode.
  2. Respect IE setting for opening URLs in tabs or windows.
  3. Support EPM mode in modern IE versions.


  1. Removed a reference to the NPAPI plugin, which would cause issues with Chrome 45+.


  1. Added "Keep last Chrome tab open" policy.
  2. Fixed a bug where more precise entry in the list of URLs to open in any browser will be ignored if a match in the list to transition is found.
  3. Support for environment variables in the policies. For example, this is now a valid entry: %PROFILE%/AppData/Local/Google/Application/chrome.exe.


  1. Fixed a bug causing the extension to hang Chrome if it has a problem loading its components.
  2. Introduced a beta channel for testing future LBS versions.


  1. Removed deprecated NPAPI plugin from the extension.
  2. Added policy schema manifest as required by newer Chrome versions.
  3. Detect browsers installed works for a single user instead of system-wide as it used to be.
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