Hi! If you think Firefox has a virus or malware, first try running a full antivirus scan on your computer. Then, open Firefox and check your extensions remove any you don’t recognize. You can also refresh Firefox (under Help > Troubleshooting Information) to reset it to default without losing your bookmarks. Hope that helps!

Hi, did you get a message from your security software mentioning a specific file? To make sure you only delete unwanted files, it would be helpful to get that information. For example:

• a specific file in the cache folder - this includes scripts that were part of pages you visited
• a specific file in a different folder

If the problem is that there are unwanted popup messages coming from Firefox as you browse, here are three things to check:

(1) Remove notification permission for any unknown/unwanted sites. Here's how:

On the Settings page, in the tiny search box, slowly type perm to filter the page to the Permissions section. To the right of Notifications, click Settings. Remove permission for any sites that you don't trust.

(2) Unregister any unnecessary Service Workers. Here's how:

Type or paste about:serviceworkers in the address bar and press Enter to load that page. These background scripts keep running even after a page's tab is closed. Unregister everything you don't visit frequently as well as everything you do not need notifications from.

(3) Purge any untrusted extensions. Here's how:

Open the Add-ons page. Either:

• click the Extensions button (puzzle piece) on the toolbar > Manage Extensions
• Ctrl+Shift+a (Mac: Command+Shift+a)
• "3-bar" menu button (or Tools menu) > Add-ons
• type or paste about:addons in the address bar and press Enter/Return

In the left column of the Add-ons page, click Extensions. On the right side, find the "Manage Your Extensions" heading.

If there is at least one extension before the next heading -- "Recommended Extensions" -- please continue:

Then cast a critical eye over the list below that heading. Any extensions Firefox installs for built-in features are hidden from this page, so everything listed here is your choice (and your responsibility) to manage. Anything suspicious or that you just do not remember installing or why? If in doubt, disable (or remove). For your privacy and security, don't let mystery programs linger here.

Any improvement?

Note: Sometimes extensions can frustrate access to this page. In that case, first restart Firefox in its Troubleshot Mode and then try again. See: Use Troubleshoot Mode in Firefox -- Open, not Refresh.