A password policy can be excellent while the browser handling those passwords is poorly governed. An extension installed to save a few minutes may have access that no one has reviewed since onboarding.
The useful question is not whether all extensions are dangerous. It is whether the organization knows which ones it permits, what they can access, and who is responsible for a change.
Review permission, not popularity
OWASP's browser-extension guidance discusses risks including excessive permissions, data leakage, and malicious updates. A large installation count or recognizable name does not answer those permission questions.
Begin with business-managed browser environments. List the extension, publisher, installation source, required permissions, approved purpose, and owner. Check whether it operates on every visited site or only the sites needed for its function.
Avoid treating a permission request as proof of malicious intent. Broad access can be legitimate, but it needs a documented business reason and a decision about the associated risk.
Look at the workflow around sensitive sites
A hypothetical sales utility may need to read a customer-management application. That does not automatically justify access to administrative consoles or all browsing activity.
Ask whether the browser can restrict where the extension operates, whether a managed alternative exists, and whether the same task could be performed with fewer permissions. Use approved test environments to evaluate behavior.
Pay special attention to people who use the same browser profile for ordinary browsing and privileged administration. Separating those workflows can make the review more precise.
Prepare for a change in trust
An approved extension is not a permanent exception. Define what happens when the publisher changes, permissions expand, the product becomes unsupported, or security staff receive a credible alert.
The owner should know who can disable the extension centrally and how the affected business process will continue. A hurried disablement is easier when a fallback was planned before the incident.
If credential exposure is independently reported, do not attribute it to an installed extension merely because the extension had broad access. Correlate endpoint and browser evidence through the authorized response team.
Measure what you can actually defend
Useful review outcomes include fewer unowned extensions, explicit permission decisions, a removal process, and a tested response contact. The raw number installed is a starting point, not a risk score.
Keep the review separate from monitoring claims. An exposure finding can prompt investigation; it does not provide a complete history of browser activity or identify a malicious extension by itself.
Read password managers and endpoint risk and work access on personal devices. Browser governance matters because account security also depends on the environment where people work.