Avoid this kind of useless AntiVirus extensions that in facts can spy what you are looking on the internet, it's just collecting informations on you to profile you and similar customers to finally target ads/products/services. That's desguished spyware in counterpart to provide you a pretended nice service for free.

And just about the service provided: this kind of extensions (lots of similar exist like this one) can modify the webpages on-the-fly and also can censure some parts or search results to guide you to buy to a specific shop/information site/etc... instead of a concurrent. And guess who is paying the extension editor to do that? Sellers? Governments? ...?
Just look at what this extension is requiring at the Permissions part...

Mind again before adding browser extensions!

Causes ANNOYING popup of "Refresh now" and "Refresh later" banner to come up, under the bookmarks toolbar, on ALL FireFox {version 80.0.1 (64-bit)} tabs !!!

Was driving me NUTS until I turned off all FF extensions and then back on, one by one, waiting 30 min's after turning one extension on until turning on the next extension. AS SOON as I turned on this one, BOOM, popup immediately appeared.

I have disable this extension.

I like what its supposed to do, but, this behavior is crazy.

When I went to the developer's website, turns out this extension is RUSSIAN and unless you click to let them "process your personal data" it will not allow you to give them feedback.

Not OK.