Yes, almost all modern Firefox Add-ons and themes are compatible with the ESR version.
Administrators can use Group Policy or a JSON file to pre-configure the browser across hundreds of machines, locking down settings or pre-installing necessary extensions.
Upon first launch, you can easily import bookmarks and passwords from Chrome or Edge. Firefox ESR vs. Standard Firefox Firefox Standard Firefox ESR Update Cycle Every 4 weeks Every 42 weeks (major) New Features Immediate access Delayed for stability Security Patches Target Audience General Users Businesses/Schools Frequently Asked Questions