If enable some sites won't work. One of them that won't work is virustotal.com
I did found a work around. Add virustotal.com to "Hide Download Bar on following web pages".

Very useful except for one big flaw: no option to disable the confirmation window when you open a file. I clicked on it, yes I want to open it, you don't need to waste my time with a pop-up window.

This works well and is helpful altogether, BUT I'd really prefer if it were possible for it to be put on a separate bar without it having to append code to every page.
I know this isn't this extension's fault and a limitation that came with Mozilla's transition to WebExtensions..
The appended bar sadly overlaps the URL tooltips when they're shown at the bottom of the page as well (which is the default behaviour for Firefox).

Also, it's missing an option to disable the dialogue that pops up whenever a file is opened or executed directly from the bar. The dialogue counts as an actual window that is then added to the list of closed windows. We should avoid that.

rat tot

it would be fine at what it does, were it not for the constant begging for donations. it's shown on an update popup to disguise it as an update, but the extension hasn't been updated in several years, yet the popup obnoxiously appears at least once a month if not more often.

Всё ещё не исправлено!
Проблемы на сайте https://www.virustotal.com
При отключении этого AddOn-a, сайт работает нормально.

Still not fixed!
Problems on the site https://www.virustotal.com
If you disable this AddOn, the site works fine.