Firefox DLP

Detect, block & remediate PII and sensitive data in Firefox - Firefox DLP

Book a Demo

Firefox DLP

Table of Contents

Summarize and analyze this article with:

TL;DR: Strac Firefox DLP

Firefox runs on Mac, Windows, and Linux, and it is a favorite of engineers, privacy-conscious teams, and anyone standardized on Mozilla's enterprise builds. Every one of those users pastes, uploads, and downloads data through Firefox all day: an SSN into a web form, a customer CSV into ChatGPT, a database password into a web console. Strac's Firefox DLP extension inspects that activity in real time and detects, blocks, warns, or redacts PII, PHI, PCI, and secrets before they ever leave the browser. It is agentless, deploys through your MDM, and runs from the same console as your Chrome, Edge, and Safari coverage. Get it from the Firefox Add-ons store.

Why Firefox is a data-loss surface you cannot ignore

Most DLP programs quietly assume everyone is on Chrome. In reality Firefox is on developer laptops, Linux fleets, regulated environments that mandate Mozilla ESR, and any user who chose it for privacy. Those are exactly the people who touch source code, credentials, and regulated data. A browser DLP policy that skips Firefox leaves your most technical users, and your most sensitive data, uncovered. Firefox also syncs history, logins, and open tabs across devices, so data that enters Firefox on a managed laptop can resurface on an unmanaged one.

What sensitive data leaves through Firefox

The browser is now the primary exfiltration channel, because almost every app is a web app. In Firefox that means:

Data type	What leaks through the browser
PII	SSNs, dates of birth, driver's licenses, addresses pasted into web forms
PCI	Card numbers and CVVs entered into billing tools and web apps
PHI	Patient names, MRNs, and intake documents pasted into portals or AI tools
Secrets	API keys, passwords, tokens, and connection strings pasted into consoles
Source code / IP	Proprietary code and internal docs pasted into GenAI assistants
Files	Customer exports, spreadsheets, and screenshots uploaded through the browser

The four ways data leaks through Firefox

Effective Firefox DLP has to cover all four, not just one:

Paste - a user pastes an SSN or an API key into a web form, a ticket, or an AI prompt.
Upload - a user attaches a customer export or a PDF full of PII to a web app.
Download - a user pulls a sensitive report onto a personal or unmanaged device.
Sync and extensions - data moves through Firefox Sync or a third-party extension you never vetted.

✨ How Strac blocks a sensitive upload in Firefox

Strac blocking a customer export full of SSNs and card numbers from being uploaded to ChatGPT in Firefox, with an option for the user to request an exception

When a user tries to upload a file, Strac opens and inspects it in the browser, including CSVs, PDFs, Office files, and images via OCR. If it contains regulated data, Strac blocks the upload and shows the user exactly what was found. Because a hard block is not always the right answer, you decide the policy per data type: block outright, warn and allow, or block with a user-justified exception that is logged for review. You get control without turning security into a help-desk queue.

How Strac Firefox DLP works: detect, decide, act

How Strac Firefox DLP works: detect sensitive data, block or warn, redact, and audit

Detect PII, PHI, PCI, secrets, and source code as they are typed, pasted, uploaded, or downloaded. Strac ships hundreds of prebuilt detectors, and you can add your own; see the full catalog of sensitive data elements and custom data elements.
Decide per data type and destination: a card number headed to ChatGPT is not the same as an internal email in an internal tool.
Act in real time: block, warn, redact the value in place, or allow with a logged exception.
Audit every event with the who, what, where, and which data classes, ready for SOC 2, HIPAA, and PCI evidence.

✨ GenAI DLP: stop leaks into ChatGPT, Claude, Gemini, and Copilot

The biggest reason to deploy Firefox DLP in 2026 is generative AI. Employees paste customer data, source code, and PHI into ChatGPT, Claude, Gemini, and Copilot dozens of times a day, and none of it is covered by traditional DLP. Strac's Firefox extension recognizes these AI destinations and inspects the prompt and any attached file before it is sent, then blocks or redacts the sensitive parts while letting the rest of the prompt through. See AI DLP and our guide to blocking sensitive data in ChatGPT.

Deploying Strac on Firefox at scale

👉 Get the extension: install Strac Browser (Gen AI) DLP from the Firefox Add-ons store, then roll it out across your fleet below.

Strac installs as a managed Firefox extension. Push it across your fleet with your MDM or Firefox enterprise policies (policies.json), including Firefox ESR for regulated environments, on Mac, Windows, and Linux. Choose which data elements to detect and the action per type, and roll out in monitor mode first to tune policies before you start blocking. Most teams go from install to first enforced policy the same day.

Native Firefox controls vs Strac

Firefox's built-in privacy and security features protect the user from the web. They do nothing to stop the user from sending sensitive company data out through the browser. That is a different job:

Capability	Native Firefox controls	Strac Firefox DLP
Detect PII, PHI, PCI, secrets	No	Yes, hundreds of prebuilt detectors + custom
Inspect file uploads (CSV, PDF, images/OCR)	No	Yes
Block a sensitive paste or upload in real time	No	Yes
Redact the value instead of blocking the whole action	No	Yes
User-justified exception workflow	No	Yes
Detect sensitive data going into ChatGPT / Claude / Gemini	No	Yes
Audit log mapped to SOC 2 / HIPAA / PCI / GDPR	No	Yes

Compliance

Browser activity is in scope for every major framework, and auditors increasingly ask specifically about AI tools. Strac maps to SOC 2 CC6 (logical access and confidential data), HIPAA (preventing PHI from leaving through the browser), PCI DSS 4.0 (keeping card data out of scope), and GDPR (preventing personal-data transfers), and produces the per-event audit trail that turns a control into evidence.

Firefox, every browser, and the endpoint from one console

Firefox is one surface. Strac covers Chrome, Edge, and Safari from the same console, and pairs with endpoint DLP to cover downloads, USB, printing, and other exit channels beyond the browser. One policy, every path.

🌶️ Spicy FAQs on Firefox DLP

Does Firefox have built-in DLP?
No. Firefox has strong privacy features that protect the user from the web, but nothing that classifies content or stops a user from pasting or uploading sensitive company data out through the browser. That requires a dedicated tool like Strac.

Can Strac block a file upload in Firefox, or only detect it?
It can do both, and you choose. Strac opens and inspects the file (including CSVs, PDFs, and images via OCR) and can block the upload, warn the user, redact the sensitive parts, or allow it with a logged justification, set per data type.

Does it work on Firefox ESR and on Linux?
Yes. Strac supports Firefox including ESR, and runs on Mac, Windows, and Linux, which is why it is a fit for the developer and regulated environments where Firefox is common.

Will it stop engineers pasting secrets into ChatGPT?
Yes. Strac detects API keys, tokens, passwords, and source code in a prompt headed to ChatGPT, Claude, Gemini, or Copilot and blocks or redacts them before the prompt is sent.

How do I deploy it across my fleet?
As a managed extension via your MDM or Firefox enterprise policies. Start in monitor mode to tune policies, then switch on enforcement. Most teams are live the same day.

Does the user get a say, or is it always a hard block?
Your call. Policies can hard-block, warn and allow, or block with a user-justified exception that is logged, so you keep control without creating a help-desk bottleneck.

Trusted by enterprises
Discover & Remediate PII, PCI, PHI, Sensitive Data

Book a Demo

Sharepoint DLP Use Cases

Practical Scenario

A hospital’s billing and administrative teams use SharePoint Online to store patient invoices, medical reports, and insurance forms. While collaborating with external insurance providers, a staff member accidentally updates the permissions on a SharePoint document library to “Anyone with the link,” exposing potentially thousands of patient files containing PHI.

How Strac's Sharepoint DLP Helps

Continuous Data Discovery: Strac automatically scans existing and newly uploaded documents, identifying PHI (e.g., medical record numbers, Social Security Numbers).
Classification & Labeling: Once identified, files are labeled (e.g., “HIPAA Sensitive”), ensuring that administrators know which documents require the highest level of protection.
Visibility into Access: Strac provides real-time insight into who has access to these sensitive documents. Administrators can instantly see if unauthorized users or broad groups have viewing rights.
Revoke Public Links: If a file is publicly accessible, Strac immediately revokes those links and restores restricted access.
Alerts & Quarantines: When someone attempts to share PHI externally, Strac can alert admins, quarantine the file for review, or completely block the action.
Audit-Ready Reports: All actions are logged, enabling quick incident response and demonstrating HIPAA compliance for audits.

Practical Scenario

A mid-sized investment firm uses SharePoint to collaborate on various client files, including:

Credit card statements (subject to PCI-DSS)
ID documents (Driver’s Licenses, Passports, etc.) used for KYC (Know Your Customer) verification
Banking information such as account and routing numbers

An associate accidentally shares a SharePoint folder containing these files with a newly onboarded client who does not require access to all confidential documents. This folder is also accessible to several internal teams outside the immediate project, creating multiple potential exposure points.

How Strac's Sharepoint DLP Helps

Comprehensive Data Discovery: Strac scans both existing and newly uploaded documents in SharePoint for sensitive information such as credit card numbers, bank account details, and ID documents (Driver’s License, Passport formats).
Classification & Automated Labeling: Once identified, Strac applies meaningful labels (e.g., “PCI-DSS Sensitive,” “PII – ID Documents,” “Banking Info”) to ensure these files stand out and are subject to stricter security rules.
Visibility into Access: Strac provides an immediate view of who currently has access to these sensitive files. This allows admins to spot situations where external clients or internal teams unnecessarily have permissions.
Public Access Revocation: If a labeled document (e.g., containing card data or ID scans) is found to be publicly shared or too broadly accessible, Strac automatically revokes these links or permissions, aligning access with the principle of least privilege.
Alerts, Quarantines, and Blocks: When a user attempts to share a labeled document with outside domains—or with an entire department—Strac alerts administrators or quarantines/blocks the file share, depending on policy settings.
In cases where the share is intentional but needs review, admins can approve or deny the request within Strac’s dashboard.
Audit & Compliance: Every sharing event, label assignment, and access revocation is logged, creating a detailed audit trail. This helps demonstrate compliance with PCI-DSS, KYC, AML, and other regulatory requirements.
Automatic reporting simplifies any regulatory or internal compliance audit, reducing the administrative burden on security and compliance teams.

Practical Scenario

A software company keeps source code, product roadmaps, and design specs in SharePoint. Several teams—including external contractors—use the same SharePoint site. A developer accidentally grants a large group, including some non-disclosure–exempt contractors, access to a folder containing patent-pending code.

How Strac's Sharepoint DLP Helps

Holistic File Scanning: Strac inspects documents, PDFs, and archives for code snippets, system designs, and proprietary business terms to detect potential IP.
Intelligent Labeling: Documents identified as containing IP or trade secrets are automatically classified (e.g., “Proprietary IP”), reinforcing the need for restricted sharing.
Real-Time Access Insights: With Strac, administrators can instantly see who has access to IP-tagged files, enabling them to remove unauthorized users or reduce permission scopes.
Immediate Link Removal: If a contractor or external partner is mistakenly granted access to IP, Strac revokes public or unauthorized sharing before the files can be downloaded.
Alerts & Blocking: Strac’s policies can be configured to alert security teams or block external sharing attempts for files containing proprietary content.
Incident Response & Auditing: Detailed logs of every share request, label change, and access revocation aid in quick incident resolution and help prove due diligence if legal issues arise.