Is Side Browser safe?

Low risk

Side Browser removes security headers from embedded pages opened in browser subframes.

Side Browser installs a browser rule that applies to all subframe responses and removes headers such as Content Security Policy, X-Frame-Options, COOP, and COEP. This can make embedded pages load in contexts where the site normally tries to block framing or isolate content. The confirmed behavior is local header modification; the claim does not show these headers being sent to another party.

Part of this rating comes from analysis signals we haven't published as detailed findings yet.

extrastuv1.0.49Chrome Web Store
19Risk
Who publishes it

extrastu - no other listings under this identity

What this publisher told the store about itself, and the other listings that told it the same thing.

Publisher
extrastu

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 1.0.49. 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

    <all_urls>

  • Show a panel beside the page

    sidePanel

  • Read and change your bookmarks

    bookmarks

  • Add items to the right-click menu

    contextMenus

  • Store data in your browser

    storage

  • Read and change your full browsing history

    history

  • Block and redirect the requests your browser makes

    declarativeNetRequest

  • Schedule its own background tasks

    alarms

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Updated 30 September 2026pcamlcdojeblfddaeoajojpjnenniedk