Is Stylus safe?
Stylus ships hardcoded OAuth client secrets for Google Drive, OneDrive, and UserStylesWorld in its extension source.
Stylus is a user-styles manager that injects custom CSS into web pages across all sites. Its sync feature includes OAuth integration with Google Drive, OneDrive, and UserStylesWorld, with the client secrets for all three providers stored in plaintext in the background script. These secrets are sent verbatim in token-exchange requests when a user connects a sync account.
Who publishes itStylus Team - no other listings under this identity, 10 shared hostnames
Stylus Team - no other listings under this identity, 10 shared hostnames
What this publisher told the store about itself, and the other listings that told it the same thing.
Shared hosts - 10 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.
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 2.4.17. 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>
Schedule its own background tasks
alarms
Add items to the right-click menu
contextMenus
Store data in your browser
storage
See the address and title of every tab you have open
tabs
Store an unlimited amount of data in your browser
unlimitedStorage
See every page you navigate to, as you navigate to it
webNavigation
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 Stylus 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.
- oauth2.googleapis.com
Stylus sends data to oauth2.googleapis.com. 13 other extensions we have analyzed send data here.
- login.microsoftonline.com
Stylus sends data to login.microsoftonline.com. 8 other extensions we have analyzed send data here.
- userstyles.world
Stylus sends data to userstyles.world. One other extension we have analyzed sends data here.