Browser Extensions and App Permissions: A Practical Audit Checklist for Safer Devices

Overview

A permission request is not automatically a sign that an app or extension is unsafe. Some tools genuinely need access to websites, files, notifications, location, contacts, a camera, or a microphone. The useful question is whether the requested access is necessary for the advertised function, whether the publisher is identifiable, and whether you still need the software.

Review browser extensions and mobile apps separately. Browser extensions may be able to read or change information on websites you visit, while mobile apps can request access to device features and personal records. The exact menu names vary by browser and operating system, so treat the labels below as a general framework and confirm the current controls on your device.

Before making changes, write down the software you rely on for work, authentication, password management, accessibility, or security. Removing a critical tool without a replacement can interrupt your workflow or reduce protection. When an extension or app is unfamiliar, investigate it before granting additional access rather than relying on a warning-free installation.

Checklist by scenario

When reviewing browser extensions

1. List every installed extension. Open the browser’s extensions or add-ons page and include disabled items. An extension you no longer use may still be worth removing rather than leaving it available for later reactivation.
2. Confirm the publisher. Check the publisher name, support address, linked website, and store listing. Be cautious when the publisher is difficult to identify, the branding imitates a familiar company, or several unrelated extensions appear to come from the same unclear source.
3. Match access to purpose. A note-taking tool may need access to selected pages, while a coupon or search extension may request broad website access. Ask whether the permission is proportionate to the feature you use. Broad access deserves a specific explanation.
4. Review installation and usage history. If you do not remember installing an extension, check browser sync, recently installed software, and shared-device activity. An unfamiliar extension is not proof of compromise, but it is a reason to pause and investigate.
5. Check the review signals carefully. Look for recent complaints about unexpected redirects, advertisements, sign-in problems, changed search settings, or excessive permissions. Reviews can be manipulated or outdated, so use them as clues rather than definitive proof.
6. Remove what you do not need. Uninstall unused, duplicated, unsupported, or unexplained extensions. If an extension is required for work, ask your administrator or vendor to confirm its identity and purpose before deleting it.

When auditing mobile app permissions

1. Start with high-impact access. Review apps that can use the camera, microphone, location, contacts, photos, files, call history, messages, or notifications. Consider whether each permission is needed continuously, only while the app is open, or not at all.
2. Reduce access where practical. Use the most limited option that supports the feature. For example, an app may work with selected photos instead of an entire photo library, or with approximate location instead of precise location. Available choices differ by operating system and app.
3. Inspect apps you rarely open. An app that has not been used recently may still retain permissions. Remove it if it is no longer needed, or revoke access and keep it only if you have a clear reason to retain it.
4. Review the app’s stated purpose. Compare its requested access with its core function. A simple utility that asks for unrelated personal data deserves more scrutiny than an app whose main feature depends on that data.
5. Check account connections. Some apps have access through a connected account rather than only through device permissions. Review connected applications in major accounts and revoke entries you no longer recognize or use.

For a broader device review, use the online privacy audit checklist alongside this software audit. If an extension or app appeared after a suspicious message or download, preserve relevant details and review the guidance on spotting phishing and brand impersonation scams.

What to double-check

Publisher identity: A familiar logo is not enough. Compare the publisher’s name with the official website reached through a trusted source, and avoid installing a replacement from an unofficial download page.

Permission timing: Consider when access was requested. A tool that worked without broad access but later asks for expanded permissions should be reviewed before approval. Read the explanation, check whether the feature is optional, and look for a less-privileged setting.

Updates and support: An outdated tool may remain installed even when its original purpose has changed. Check whether the publisher provides a clear support channel and whether the software is still compatible with your browser or operating system. Do not assume that an update is malicious merely because its permissions changed, but do not approve changes without reviewing them.

Signs of unwanted behavior: Unexpected pop-ups, changed search settings, new toolbars, redirects, unexplained sign-in prompts, battery or data-use changes, and unfamiliar notifications can justify removal and a wider device check. These symptoms have many possible causes, so record what happened and avoid entering credentials into a prompt you did not expect.

Work and managed devices: A company-managed browser or phone may include approved extensions, security agents, or profiles that you should not remove. Follow the organization’s process and ask an administrator to verify anything that appears unfamiliar.

Common mistakes

• Keeping everything “just in case.” Unused software increases clutter and makes future reviews harder. Retain tools with a documented purpose, not those you might use someday.
• Judging safety by ratings alone. Reviews and download counts can be useful signals, but they do not establish that a tool is appropriate for your data.
• Disabling instead of removing. Disabling an extension may stop it temporarily, but removal is usually the cleaner choice when you no longer trust or need it.
• Granting access to solve a minor inconvenience. If an app requests contacts, files, or location for a feature you do not need, decline the request or find an alternative.
• Deleting before documenting. If you suspect a scam, compromise, or unauthorized installation, capture the extension or app name, publisher, permissions, dates, and relevant messages before removal. This can help with later investigation or reporting. See the online scam evidence checklist for a broader record-keeping approach.
• Reusing passwords after a suspicious sign-in. Removing a suspicious tool does not reverse credentials that may already have been exposed. Change affected passwords from a trusted device, enable stronger sign-in protection where available, and review account sessions.

When to revisit

Repeat this audit at least during regular quarterly device cleanups and whenever your workflow or tools change. It is especially useful after setting up a new phone or computer, installing several extensions, changing browsers, joining a new workplace, or restoring a device from backup.

Revisit permissions after a major browser or operating-system update, an app feature change, a publisher change, or a security alert involving software you use. If you hear about a suspicious extension or app, do not rely on an old review: check the current publisher, permissions, version information, and official guidance before deciding what to do.

Finish each review with a short action list: remove software you no longer need, revoke unnecessary permissions, verify important tools with their publishers or administrators, update trusted software through official channels, and record anything that requires follow-up. If a suspicious extension redirected you to an unfamiliar domain or prompted for credentials, use a website safety check before visiting the destination again. A small, repeatable audit is more useful than waiting for a dramatic warning or a confirmed account breach.