YOU ARE DOING IT WRONG! I been a tech 22+ years and work in a computer shop that runs 360 Total Security ever since it came out and had NO issues with it, Firefox had issues in version 52 that prevented 360 add-on from installing properly, This Add-on prevents malicious websites from infecting your PC with malicious code snippets and auto-installers(to the one asking what it does) and finally It works perfectly in free mode, we been using & giving to customers since it came out & it saved my arse & others MANY TIMES! So please use your brains & think before you write negative feedback because you are too unintelligent to figure out such a simple & diverse anti-virus..

you have tell me ?, my smartphone was too many apps

I had this same problem, however I uninstalled 360 totally and then reinstalled it from their website. I then installed the FF add-on from the 360 website and it went in flawlessly.. The strange thing is that the revision level went backward (from 1005 to 1004) when I installed the plug in from the 360 website however the update date went forward to July 25 2017 (today) . Hmmm

Complete protection is paramount with online activity.

Nice job

Very good

User hk
4 Engine is a really good basis.
viruses and internet is becoming much more dangerous than 20 years before. But in this old time most people was to unserios in handling with computer -may today same (a lot of new technik egg smartphones tabletts...)- every medium must be av-checked, downloads too.......
here 360 helps very much in an easy way, and checking all files (archives too -without limites....)....
performens keeps -in my opinion- very good, i'm using an old system............
thank you 360

Get support

Awesome well thought out. Always learning new things using this.

Gud