Hi, please see this article - Pop-up blocker settings, exceptions and troubleshooting, but be aware that it may be a malware issue, so also see - Troubleshoot Firefox issues caused by malware.

If your question is resolved by this or another answer, please take a minute to let us know. Thank you.

As I wrote, I have read the case of 50$ reward. I have already marked pop-ups as blocked and I have no exceptions. My concrete question is: How can I block a unique and defined window that pops up? I want to block a given URL that annoys me and many other people.

Adblock Plus {web link} Blocks annoying video ads on YouTube, Facebook ads, banners and much more. Adblock Plus blocks all annoying ads, and supports websites by not blocking unobtrusive ads by default (configurable).

BlockSite {web link} BlockSite is an extension, which automagically blocks websites of your choice. Additionally, this extension will disable all hyperlinks to these websites, by just displaying the link text without the clicking functionality.

If you need help with these, just ask.

I have installed BlockSite and, in trying to use it, screens appeared in Dutch. Later, I entered into WipCom, BlockSite's page and they speak only about projects and do not answer any question. So I decided to de-install the component and look for another solution.

With BlockSite, right click an empty area on the web page. One of the choices is Block Site. That page is now added to the blocking list. Open its options. then edit that entry to block the whole site.

Example;
change www.thissite.com/whatever/page to www.thissite.com*

I have reinstalled BlockSite and it still appears in Dutch when I click Options. How can I avoid that ?

What are your langauage settings, and what is your general location?

And what is in Dutch?

Let's see: I still have no settings for this complement. Problem is that in trying to click Options for the first time after installation, it opens a screen written in Dutch. Dutch is the language spoken in the Netherlands. Actually I have software installed in Catalonian, Spanish, English, French, Portuguese and German but I do not understand Dutch enough as to use it in order to configure BlockSite.

I checked my program. There is no language option.

Remove your current, and download

Adblock Plus {web link} Blocks annoying video ads on YouTube, Facebook ads, banners and much more. Adblock Plus blocks all annoying ads, and supports websites by not blocking unobtrusive ads by default (configurable).

Forum; Adblock Plus Homepage {web link}

Opps, sorry, wrong link.

BlockSite {web link} BlockSite is an extension, which automagically blocks websites of your choice. Additionally, this extension will disable all hyperlinks to these websites, by just displaying the link text without the clicking functionality.

I have removed and reinstalled and results are the very same. It is very disgusting to ask a question to BlockSite Support and not getting any answer at all. Finally I removed BlockSite and installed LeechBlock. It seems to be working fine. I already have Adblock also. but it does not block a specific URL

If you contact AdBlock, they may include that ad site. They will answer you.

Forum; Adblock Plus Homepage {web link}

You can also add this; Adblock Plus Pop-up Addon by Jesse Hakanen Adblock Plus Pop-up Addon {web link} Adblock Plus Pop-up Addon extends the blocking functionality of Adblock Plus to those annoying pop-up windows that open on mouse clicks and other user actions.