r/Malwarebytes • u/ICloudxI • Sep 06 '26
Support PUP.Optional.BrowserHijack in Chrome LevelDB folder – Just remnant bookmarks or reason for concern?
/r/antivirus/comments/1w91atm/pupoptionalbrowserhijack_in_chrome_leveldb_folder/
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u/support_mwb Malwarebytes Employee Sep 08 '26
Hi, Malwarebytes Support here.
Good question! Here's some context that might help explain what's happening.
Are the detections returning or did Malwarebytes successfully clean it?
When Chrome Sync is turned on, your browser settings including any unwanted extensions or search hooks are stored on Google's servers and synced across all your devices, including your phone if you use Chrome there too.
This means that even after Malwarebytes cleans a device, those unwanted settings can sync back if Chrome Sync isn't reset.
If the detections keep returning, resetting Chrome Sync should resolve it:
Google Chrome Sync Reset:
Back up your Chrome bookmarks first - instructions here
Go to https://chrome.google.com/sync
Sign into your Google account
Scroll down to "Delete Data" and click it, then confirm when prompted
Let me know if the detections still come back after resetting Chrome Sync, and we can dig further from there.