@sgunhouse: Thank you for your feedback! I reinstalled the plugin to make sure I hadn't forgotten to check the access to search results option when I first added it to Opera, and it now works correctly. Thank you for taking the time to answer me and help me with this, I hope this helps any other user who has problems with the display of Disqus or the shield symbol

After using this addon for a few months, I am uninstalling it. Here's why:

1. The extension does not add the "green shield symbol" next to page names when you do a Google search, unlike Chrome or Firefox, which do.
2. The extension blocks Disqus functionality on any page you visit unless you disable it for no apparent reason.
3. Apparently, this extension is a replica of the original and would not be made by the real Avast. You can see this in this forum thread in the Opera's Forum: https://forums.opera.com/topic/52869/solved-disqus-doesn-t-work-any-site/7
   (although I don't think it's really a fake extension, considering that the official Avast page promotes its extension and it says that is available for Opera)

// Some clarifications:

1. This extension did not give me any performance issues or overheating of my PC.
2. This extension never showed me any sign of having adware built in (maybe because I have custom filters in Adblock Plus, so the adware might have tried to work without success)
3. If you want to download this addon in Opera GX, try doing it from the official Avast page following the route: Privacy > Online Security & Privacy > add to Opera for free. Here's the URL of the main page of Avast: https://www.avast.com/index#pc.