Is UltraBlock - Privacy & Adblock safe?
UltraBlock sends the hostname of each page you visit to api.ultrablock.org to look up trackers.
For each new page, the extension posts the page's hostname to api.ultrablock.org, which returns a list of tracker hostnames to block; this request carries no persistent identifier. An optional 'Share results' setting, off by default, uploads per-site summaries with a persistent ID and the browser's navigator details to the same server when you leave a site; the summaries are AES-encrypted, but the key is sent in the same payload.
Who publishes itUltraBlock - no other listings under this identity
UltraBlock - 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 1.5.1. 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>
Read and change cookies, including the ones that keep you signed in
cookies
Store data in your browser
storage
Watch every request your browser makes
webRequest
Watch, block and rewrite every request your browser makes
webRequestBlocking
See the address and title of every tab you have open
tabs
Clear your browsing history, cache and cookies
browsingData
Act on the current tab, but only after you click the extension
activeTab
Where it sends data
Destinations our analysis observed UltraBlock - Privacy & Adblock 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.
- api.ultrablock.org
UltraBlock - Privacy & Adblock sends data to api.ultrablock.org. 2 other extensions we have analysed send data here.