Rated 5 out of 5 stars
This extension can't be run if you have another add-on, Bitdefender TrafficLight for Firefox, installed in your browser. Only if you open the Add-ons Manager, stop Bitdefender TrafficLight for Firefox and restart the browser, you can run BitDefender QuickScan.
It is a very strange behaviour when add-ons from the same developer block each other.
Thanks for submitting your feedback!
It seems that a bug has slipped into a recent TrafficLight add-on update, preventing the Quickscan add-on from starting the scanning session in certain situations. We are currently testing the bug fix and will roll out an update that addresses this flaw in the following hours.