How to Recover Browser Settings After a Malicious Extension Attack

Installed a program, and now your browser’s acting weird?
Homepage changed, ads everywhere, search results hijacked?

Here’s how to reset everything and get your browser back.


✅ 1. Remove the malicious extension

In Chrome:

  • Menu (⋮) → Extensions → Remove anything you don’t recognize
    In Firefox:

  • Menu → Add-ons → Extensions

✅ Sort by Installed Date to spot recent troublemakers.


✅ 2. Reset browser settings

Chrome:

  • Settings → Reset and clean up → “Restore settings to their original defaults”
    Firefox:

  • Help → Troubleshooting Information → “Refresh Firefox”

✅ Restores default homepage, search, new tab, etc.


✅ 3. Clear cache and cookies

  • Chrome/Firefox: Ctrl + Shift + Delete

  • Select “Cookies and site data” + “Cached images/files”

  • Time range: All time

✅ Fixes lingering adware redirects or session hijacking.


✅ 4. Check homepage and search settings

After reset:

  • Go to Settings → “Search engine” or “Home”

  • Set your preferred site (e.g., Google, DuckDuckGo)

✅ Hijackers love changing this silently.


✅ 5. Scan your PC with Malwarebytes

Use Malwarebytes Free:

  • Full system scan

  • Removes browser hijackers and startup malware


Key points to remember

  • Remove bad extensions ASAP

  • Reset browser settings completely

  • Clear all cached data

  • Restore your preferred homepage and search

  • Scan with a trusted malware tool

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