Updated to Firefox 124.0.1 on March 28 (from 123.0.1, which was installed on March 12). This update also installed the Keeper password manager addon. This is a work PC so it's locked down by IT admin, including extensions on FF. I have no access to about:addons ("Blocked Page - Your organisation has blocked access to this page or web site") and it's impossible to install Xpis. However, extracting info from extension.json shows that Keeper® Password Manager & Digital Vault Version: 16.8.1 was installed at the time the update to FF 124.0.1 happened. See images. How can this happen? What can be done to remove Keeper, given that I don't have access to about:addons? Possibly relevant: I do have some extensions that I had installed before Firefox extension access and install was locked down by Admin (lock down of FF was done remotely through some kind of policy), including LastPass. torata