Mozilla Firefox 27 For Mac

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This document explains all of the settings available in Mozilla Firefox for controlling pop-ups.

Table of Contents

  • 3Pop-ups not being blocked

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Pop-up windows, or pop-ups, are windows that appear automatically without your permission. They vary in size but usually don't cover the whole screen. Some pop-ups open on top of the current Firefox window, while others appear underneath Firefox (pop-unders).

Firefox allows you to control both pop-ups and pop-unders in Firefox OptionsPreferences. Pop-up blocking is turned on by default, so you don't have to worry about enabling it to prevent pop-ups from appearing in Firefox.

When blocking a pop-up, Firefox displays an information bar (if it hasn’t been previously dismissed – see below), as well as an icon in the address bar.

Mozilla Firefox 27 For Mac

When you click either the button in the info bar or the icon in the address bar, a menu is displayed with the following choices:

  • Allow/Block pop-ups for this site
  • Edit Pop-up Blocker OptionsPreferences…
  • Don't show this message when pop-ups are blocked
  • (show the blocked pop-up)
Blocking pop-ups may interfere with some websites: Some websites, including some banking sites, use pop-ups for important features. Blocking all pop-ups disables such features. To allow specific websites to use pop-ups, while still blocking all others, you can add those specific websites to the list of allowed sites.
Blocking pop-ups doesn't always work: Although Firefox blocks most pop-ups, some websites may show pop-ups using uncovered methods, even when they are blocked.

To access the pop-up blocker settings:

  1. Click the menu button and select ..
  2. Select the Privacy & Security panel.
  • Under the Permissions section, uncheck the box next to Block pop-up windows to disable the pop-up blocker altogether.
  • A click on opens a dialog box with a list of sites that you want to allow to display pop-ups.
  • The dialog box offers you the following choices:
Allow: Click this to add a website to the exceptions list.
Remove Website: Click this to remove a website from the exceptions list.
Remove All Websites: Click this to remove all of the websites in the exceptions list.
Note: Blocking pop-ups may not always work and may interfere with some websites. For more information, see the What are Pop-ups? section above.

Is the pop-up coming from Firefox?

The pop-up may not actually be coming from Firefox. You can determine where the pop-up is coming from by the appearance of the window.

  • If you see the address bar with the Site Info buttonthe Tracking Protection button and the Site Identity button (a shield and a padlock) in the pop-up window, the pop-up is coming from Firefox.
  • If you don't see the buttonthese buttons, you may have malware on your computer that causes the pop-ups. For help, see Troubleshoot Firefox issues caused by malware.

Is the pop-up blocker on and enabled for this site?

  1. Click the menu button and select ..
  2. Select the Privacy & Security panel and go to the Permissions section.
  3. Make sure the Block pop-up windows checkbox is checked.
  4. To the right of Block pop-up windows, click the button. A dialog box will open with a list of sites that are allowed to show pop-ups.
  5. If the site that's opening pop-ups is listed here, select it and press .
  6. Click on to update your changes.
  7. Close the about:preferences page. Any changes you've made will automatically be saved.

Is the pop-up shown after a mouse click or a key press?

Certain events, such as clicking or pressing a key, can spawn pop-ups regardless of if the pop-up blocker is on. This is intentional, so that Firefox doesn't block pop-ups that websites need to work.

Is it a true pop-up window?

Sometimes ads are designed to look like windows, but really aren't. Firefox's pop-up blocker can't stop these ads.

Firefox For Macs

Mozilla surveys

When you visit a Mozilla website, sometimes you'll see a pop-up asking you to participate in a survey. The only third-party that Mozilla ever uses for surveys is SurveyGizmo, which has been vetted by our legal and privacy teams. The Firefox pop-up blocker doesn't block these pop-ups.

Mozilla Firefox 27 For Mac Shortcut

Yesterday I installed the latest download of Firefox for Mac. It appears that I cannot visit any website, because I always get the message that the certificate is issued by an unknown authority. I spent most of the day finding a solution and am fed up now with Ff. I found many help pages, suggesting to remove cert8.db when Ff is closed, to reset Ff and several other solutions. I tried them all but nothing worked. No Web page has a valid certificate according to Ff. I am well acquainted with Ff. I have used it for years on Windows, Linux and Android and never had problems of this kind. I'm am using Osx 10.10.3 (rolled out yesterday, April 9 2015 with the latest available Ff for Mac. (27.0.1)After spending a whole day at pointless troubleshooting only one question remains: Is Ff for Mac not compatible with the brand new Osx 10.10.3?Thanks.Rene Hasekamp.