Hello, so a few minutes ago a popup opened (due to a website) and tried to intall an addon on firefox, there was that dialogue window from firefox asking me to install it or cancel it, due to a different dialogue window I needed to close firefox with a taskmanager. Now, I'm not sure how firefox works, so I wanted to ask if firefox completely discarded the installation or somehow let it download it. Did it leave anything on my computer? Did it completely discard the installation? Am I safe? I didn't click on anything, just ended the task via taskmgr