Is Emsisoft Browser Security safe?

Clean risk

Emsisoft Browser Security sends salted hashes of visited frame hostnames to Emsisoft's URL reputation service.

The extension checks each main-frame and sub-frame navigation by extracting the destination hostname, building hostname suffixes, and sending salted MD5 hashes of those hostnames to Emsisoft. The returned reputation data is cached locally and used to decide whether to allow the page or redirect it to the extension's block page.

Emsisoftv2023.8.0.56Firefox Add-ons
3Risk

AI-generated. Findings may contain errors. Those marked Verified have been manually reviewed.

Publishers can request a review.

What it can do

Permissions this extension asks for, as declared in version 2023.8.0.56. Asking for a permission is not a finding on its own - it is what the extension can do if it chooses to.

  • Read and change your data on every site you visit

    *://*/*

  • Read and change your data on alomar.emsisoft.com

    https://alomar.emsisoft.com/*

  • Store data in your browser

    storage

  • See the address and title of every tab you have open

    tabs

  • Watch every request your browser makes

    webRequest

  • Watch, block and rewrite every request your browser makes

    webRequestBlocking

Where it sends data

Destinations our analysis observed Emsisoft Browser Security contacting. Sending data somewhere is not a finding on its own - an extension that syncs your settings has to talk to its own server - but it is where your data can go, and who else it goes to.

  • alomar.emsisoft.com

    Emsisoft Browser Security sends data to alomar.emsisoft.com. No other extension we have analysed sends data here.

Updated 30 September 2026amo-1016178