This update provides Mozilla Firefox 60.0 ESR, with the following improvements:

- New browser engine with speed improvements
- Redesigned graphical user interface elements
- Unified address and search bar for new installations
- New tab page listing top visited, recently visited and recommended pages
- Support for configuration policies in enterprise deployments via JSON files
- Support for Web Authentication, allowing the use of USB tokens for authentication to web sites

The following changes affect compatibility:

- now exclusively supports extensions built using the WebExtension API
- Unsupported legacy extensions will no longer work in Firefox 60 ESR
- TLS certificates issued by Symantec before June 1st, 2016 are no longer trusted
The "security.pki.distrust_ca_policy" preference can be set to 0 to reinstate trust in those certificates

The following issues affect performance:

- new format for storing private keys, certificates and certificate trust
If the user home or data directory is on a network file system, it is recommended that users set
the following environment variable to avoid slowdowns: NSS_SDB_USE_CACHE=yes
This setting is not recommended for local, fast file systems.

The following item is specific to the ESR channel of releases:

- Service workers and push notifications remain disabled in Firefox ESR
- The Mozilla Firefox packages in openSUSE Leap 42.3 will continue to follow the upstream ESR releases.

This update does not contain vulnerability fixes relative to 52.8.0, but is recommended for all users.