Start with a full list of installed extensions

Open your browser's extensions manager to see every installed item, including those that are currently disabled. In Firefox this is found in the Add-ons Manager under the Extensions tab. Review each entry individually rather than skipping disabled ones, because a disabled extension can still be re-enabled later or may have been installed without your knowledge.

Ask yourself three quick questions for every extension: Do I remember installing it? Do I still need it? If the answer to either is no, plan to remove it. Extensions installed without your recall are especially concerning because they may have arrived through bundled software or other indirect methods.

  • List every extension, active or disabled
  • Note the last time you used each one
  • Flag any whose purpose you cannot recall

Examine the permissions each extension requests

Permissions messages appear when an extension is installed and show exactly which data or browser features it wants to access. Compare these requests against the extension's stated purpose. An extension that claims to block ads should not need access to your location or all browsing history unless the description explains why.

In the Add-ons Manager you can view detailed permissions for any installed extension. If the requests seem broader than necessary, treat that as a reason to remove the extension rather than keep it. Optional permissions can also be managed later if the extension requests them during use.

  • Check whether permissions match described features
  • Look for explanations on the extension page or developer site
  • Remove extensions whose permissions exceed their stated function

Check publisher identity and update history

Look at who created the extension and whether the developer maintains a consistent online presence. A known company or long-standing individual developer with matching website and social activity is easier to trust than an unknown publisher. Red flags include vague names, broken websites, or no recent activity.

Review the last update date. Extensions that have not been updated in years may be abandoned and therefore more likely to contain unpatched vulnerabilities. Sudden recent updates after long inactivity can also indicate a change in ownership that warrants extra caution.

  • Confirm the developer has a legitimate site and recent updates
  • Avoid extensions with no reviews or inconsistent publisher details
  • Note the date of the most recent update for each item

Evaluate reviews, ratings, and privacy policy

Read recent user reviews instead of relying only on star ratings. Comments that mention unexpected pop-ups, data collection, or performance problems are useful signals. Extensions with very few reviews leave you without community feedback, so weigh that lack of information when deciding whether to keep them.

Check whether the extension publishes a privacy policy and whether you are comfortable with the data handling described. If no policy exists or the terms allow broad collection and sharing, removal is the safer choice for extensions you no longer actively use.

  • Read recent reviews for mentions of data or performance issues
  • Confirm a privacy policy exists and review its terms
  • Remove extensions that lack transparent data practices

Remove or restrict extensions you decide to drop

Once you identify extensions that are no longer needed, remove them through the extensions manager. In Chrome and Firefox this is a single click on the Remove button. After removal, restart the browser to ensure any background processes stop. Periodically repeat the entire audit every few months to keep the list current.

If you want to keep an extension but limit its reach, adjust site access settings where available. Restricting an extension to specific sites or requiring a click to activate reduces its exposure without full removal.

  • Remove unused extensions immediately after review
  • Restart the browser after bulk removals
  • Revisit the list every few months as a routine check