Hello,

This popups/ads, sometimes comes from addons or malwares, then try these two ideas:

• Firefox in safe mode
• Problems caused by malwares

Also you can try use a popup/ads blocker:

• Adblock Plus
• Simple Adblock
• Adblock Plus Pop-up Addon
• More results

Firefox's built-in popup blocker is effective against some popups, but it allows popups triggered by clicking a link or moving your mouse pointer over a triggering element.

If you aren't doing anything when the popup opens, they could be generated from rich media (Flash) ads. The web loses a lot of usability if you disable Flash completely, but you could try temporarily setting Flash to Click-to-Play ("Ask to Activate"). This will delay Flash from starting on a page until you approve it.

To set "Ask to Activate", open the Add-ons page using either:

• Ctrl+Shift+a
• orange Firefox button (or Tools menu) > Add-ons

In the left column, click Plugins. Look for "Shockwave Flash" and change "Always Activate" to "Ask to Activate".

When you visit a site that wants to use the Flash, you should see a notification icon in the address bar and one of the following: a link in a black rectangle in the page or an infobar sliding down between the toolbar area and the page.

Does that affect the popups?