storage
Storage and browser data
Review supported access to cookies, localStorage, and sessionStorage. Decide whether the resource needs that data for its role instead of carrying forward broad access by default.
JAVASCRIPT PERMISSIONS
Give scripts the access they need.
SiteWall by CellWall helps security and engineering teams manage JavaScript permissions for supported browser capabilities. Review observed resource activity, choose which capabilities to allow, and constrain network destinations. Use these controls to apply least-privilege decisions to third-party scripts, with zero-trust defaults for newly discovered resources and explicit exceptions where the website needs them.
CONTROL WHAT CODE CAN ACCESS
A script can be useful without unrestricted access.
Allowing an integration does not mean every browser capability is necessary. Review the role of its resources and configure supported permissions for storage, DOM interaction, device features, and other browser APIs. Start from a preset or adjust individual capabilities to match the intended use.
The browser-capabilities animation shows preset selection and individual controls. Available enforcement applies to supported, instrumented browser operations.
Review observed use first
Inspect available API activity before choosing permissions. Observed use is a starting point for review, not proof that every legitimate interaction has been exercised.
Make exceptions deliberate
Permit the capabilities a resource needs while reviewing access that is unrelated to its purpose. Test the relevant website journeys after changing permissions.
LEAST PRIVILEGE IN THE BROWSER
Different capabilities deserve different decisions.
Connect each permission to a concrete need. A script's presence on the page should not be the only reason it receives access.
dom
Page interaction
Consider supported content-reading and DOM-modification capabilities separately. A resource that displays an interface and one that measures activity may need different permissions.
device
Device and additional APIs
Review supported device, clipboard, canvas, and notification capabilities. Keep the decision tied to the feature the visitor is using, and validate behavior on the relevant journeys.
CONTROL WHERE REQUESTS GO
Network access is only the first decision.
A resource may need to make requests without needing unrestricted destinations. Review supported network restrictions separately from other capabilities, including approved destinations and available region settings. Match the scope to the integration's actual communication requirements.
The network-policy animation illustrates configurable destination and region controls. A region selection is a technical restriction, not a complete data-residency or compliance determination.
Review destination scope
Use supported destination restrictions to limit communication to approved endpoints rather than treating network access as an unrestricted grant.
Keep working paths in view
Check authentication, checkout, forms, and other relevant flows before tightening permissions. A blocked request can affect a legitimate feature as well as unwanted activity.
FROM OBSERVATION TO PERMISSION
Make least privilege a reviewable decision.
Use browser observations to inform controls, then validate the experience the controls are meant to preserve.
01
Understand the resource
Review the provider, resource identity, and available API activity. Establish the integration's purpose with the responsible team before deciding what access is appropriate.
02
Choose the permitted capabilities
Select a preset or review individual permissions and network restrictions. Apply zero-trust defaults to newly discovered resources, then explicitly allow what has been reviewed.
03
Validate and revisit
Test the affected website journeys and review subsequent observations and findings. Revisit permissions when a resource's purpose or behavior changes; do not assume every changed file is automatically reapproved.
Explore related workflows
Connect capability decisions with observation, policy scope, and ongoing governance.
SiteWall capabilities
See how JavaScript permissions fit within SiteWall's client-side security capabilities.
Runtime JavaScript monitoring
Inspect supported browser API activity and findings before choosing access.
Browser policy enforcement
Understand global defaults, provider policies, resource exceptions, and enforcement scope.
Third-party script governance
Review the purpose and continued use of third-party scripts alongside their permissions.
Practical questions
Questions about JavaScript permissions
What is JavaScript permissions management?
It is the process of deciding which supported browser capabilities a script can use. SiteWall exposes capability and network controls so teams can review access at resource or provider scope instead of relying only on whether a script is allowed to load.
How does this support least privilege for third-party scripts?
Teams can review observed activity and intended purpose, then permit supported capabilities needed by the integration. Observations inform the decision, but testing is still needed because an observed period may not include every legitimate interaction.
Which browser capabilities can I review?
The policy interface includes storage, network, script execution, DOM interaction, clipboard, device, and other capability groups. Enforcement is limited to supported browser operations covered by the implementation, rather than every possible JavaScript operation.
What does zero trust mean for new resources?
The global zero-trust setting blocks newly discovered third-party resources until they are explicitly allowed through policy. It is a default for unknown resources, not a claim that every modification to an existing resource triggers a new approval workflow.
Are these the same as browser permission prompts?
No. These are website script-policy controls, not a replacement for a visitor's browser permissions or consent choices. Where a browser requires a user grant, a script policy does not grant it on the visitor's behalf.
How is this different from policy enforcement?
This page focuses on which capabilities and destinations a script needs. Policy enforcement explains how global, provider, and resource rules are scoped and applied. Use both when turning a capability decision into an effective policy.
MAKE ACCESS DELIBERATE
Decide what scripts can do on your website.
Review browser capabilities, narrow unnecessary access, and validate the experience your visitors rely on.
