Is Mobile View Switcher safe?

Clean risk

Mobile View Switcher rewrites the browser User-Agent header and page-reported User-Agent on every site.

When enabled, the extension installs a browser request rule that sets the User-Agent header on all visited sites, including frames, XHR, and websockets. It also injects a page script so navigator.userAgent returns the configured mobile-view value instead of the browser default.

Bernardv0.2.2Firefox Add-ons
1Risk
Who publishes it

Bernard - no other listings under this identity

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

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 0.2.2. 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

    *://*/*

  • Store data in your browser

    storage

  • Run its own code inside the pages you visit

    scripting

  • Add items to the right-click menu

    contextMenus

  • Block and redirect the requests your browser makes

    declarativeNetRequest

Updated 30 September 2026amo-874545