Is Bonjourr · Minimalist New Tab Page safe?

Medium risk

Bonjourr sends shortcut link origins, sync URLs, and custom background URLs to its own proxy service when direct requests fail.

On every new tab load, Bonjourr transmits the origin of each user-added shortcut link to services.bonjourr.fr to fetch favicons. When a user-configured sync URL or custom background URL cannot be fetched directly (e.g. due to CORS restrictions), the extension silently forwards those full URLs to Bonjourr's proxy server without notifying the user.

Victor Azevedov22.3.0Firefox Add-ons
45Risk
Who publishes it

Victor Azevedo - no other listings under this identity, 6 shared hostnames

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

Publisher
Victor Azevedo

Shared hosts - 6 hostnames

Hostnames hardcoded in this extension that few other listings call. That can mean one operator behind both, and it can equally mean a small shared vendor, so it is context rather than a conclusion. Hosts that many listings call are left out: they are services, not connections.

google.az
Also called by 2 other listings, including Bonjourr
kofi.bonjourr.fr
Also called by 2 other listings, including Bonjourr
weather.bonjourr.fr
Also called by 2 other listings, including Bonjourr
services.bonjourr.fr
Also called by 3 other listings, including Bonjourr
fontsource.org
Also called by 5 other listings
google.rs
Also called by 8 other listings

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

Publishers can request a review.

Findings

Private sync URL is sent to Bonjourr proxy after sync fallback

MediumunwantedCWE-319Dynamic sandbox

When Bonjourr's URL sync direct request fails, the extension sends the full sync URL to Bonjourr's proxy service.

What actually happens

You did this

The user configures URL sync or triggers a sync-down operation.

The extension did this

If the direct sync fetch fails, the extension posts the full configured URL to Bonjourr's proxy.

Captured request

POSThttps://services.bonjourr.fr/proxy

Fields in the request

  • Your sync URL
    https://example.com/private/bonjourr-sync.json (illustrative)

    This is the user-configured URL used for Bonjourr sync; it may identify a private storage location or include sensitive path/query details.

Observation

Dynamic analysis confirmed the fallback path: after a direct fetch failure, Bonjourr posted the configured sync URL to its proxy service.

What it can do

Permissions this extension asks for, as declared in version 22.3.0. Asking for a permission is not a finding on its own - it is what the extension can do if it chooses to.

  • Store data in your browser

    storage

Where it sends data

Destinations our analysis observed Bonjourr · Minimalist New Tab Page 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.

  • services.bonjourr.fr

    Bonjourr · Minimalist New Tab Page sends data to services.bonjourr.fr. One other extension we have analyzed sends data here.

Updated 2 November 2026amo-2269040