FFOX-00-000021 - Firefox autoplay must be disabled.

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Autoplay allows the user to control whether videos can play automatically (without user consent) with audio content. The user must be able to select content that is run within the browser window.


Windows group policy:
1. Open the group policy editor tool with 'gpedit.msc'.
2. Navigate to Policy Path: Computer ConfigurationAdministrative TemplatesMozillaFirefoxPermissionsAutoplay
Policy Name: Default autoplay level
Policy State: Enabled
Policy Value: Block Audio and Video

macOS 'plist' file:
Add the following:

Linux 'policies.json' file:
Add the following in the policies section:
'Permissions': {
'Autoplay': {
'Default': 'block-audio-video'

See Also


Item Details

References: CAT|III, CCI|CCI-000381, Rule-ID|SV-251565r832307_rule, STIG-ID|FFOX-00-000021, Vuln-ID|V-251565

Plugin: Unix

Control ID: e5d5a8cbb641e65101611389588e6243511a7acc4ef076f6fef7f9983b528ff6