@leocg I don't think it's desktop notification. It pops out on every web page asking allow or deny or notification and it's very annoying. I hope there's a solution to this.

Is there any way to turn it off? I've gone to content settings and turn off the "ask before sending" button but it still asked me on every new web page. Even I added the web address on the blocked list beforehand, that pop-up will still appear when I opened said page. True that I only had to do it once every page but I'd rather it disappear forever. Thank you for your help.