Except where noted, everything here applies to both Firefox 89 and the Firefox 78.11 ESR.

General

• Signatures are now shown when viewing PDF files. This change is only in Firefox 89, not the ESR.

Bug fixes

• If the DisablePasswordReveal policy was used, creating new logins in the password manager didn't work correctly. This was fixed in bug 1696948.

Policies

• The AllowedDomainsForApps policy has been added. This allows you to define which domains are allowed to access Google Workspace. It is based on the Chrome policy of the same name.

• The ExtensionSettings policy has been updated to allow disabling updates to individual extensions with the updates_disabled option.

• The Preferences policy has been updated to support preferences that begin with gfx. or layers..