Is Legacy Browser Support safe?
Legacy Browser Support lets arbitrary websites invoke its browser-switcher flow for policy-matching URLs.
The extension exposes an action page that reads a URL from the page fragment and asks the background script whether that URL should redirect. If it matches policy, the background script sends the URL to the native browser-switcher host without verifying that the request came from the extension's own redirect flow.
Part of this rating comes from analysis signals we haven't published as detailed findings yet.
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 0.4. 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
http://*/*
Read and change your data on every secure site you visit
https://*/*
Store data in your browser
storage
See the address and title of every tab you have open
tabs
Watch every request your browser makes
webRequest
Watch, block and rewrite every request your browser makes
webRequestBlocking
Talk to a program installed on your computer, outside the browser's sandbox
nativeMessaging
Where it sends data
Destinations our analysis observed Legacy Browser Support 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.
- org.mozilla.browserswitcher
Legacy Browser Support sends data to org.mozilla.browserswitcher. No other extension we have analysed sends data here.