1

After uninstalling Firefox 57 and reinstalling Avast browser security no longer is showing up.Missing from Chrome also.Any thoughts?

2

For Chrome: https://chrome.google.com/webstore/detail/gomekmidlodglbbmalcneegieacbdmki

3

Working also in FF 57

http://screencast-o-matic.com/screenshots/u/Lh/1511030108430-17984.png