We're calling on all EU-based Mozillians with iOS or iPadOS devices to help us monitor Apple’s new browser choice screens. Join the effort to hold Big Tech to account!

This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

This thread was archived. Please ask a new question if you need help.

Disable "Unable to connect" frames / placeholders for blocked content. (browser.display.show_image_placeholders didn't do it)

bitpir8
bitpir8
more options

HOSTS file blocks advertising domains. Firefox now shows "Unable to connect" pages everywhere on a site that an advertising domain is blocked. Long ago setting browser.display.show_image_placeholders to false fixed this. Doesn't anymore. How does this work now?

HOSTS file blocks advertising domains. Firefox now shows "Unable to connect" pages everywhere on a site that an advertising domain is blocked. Long ago setting browser.display.show_image_placeholders to false fixed this. Doesn't anymore. How does this work now?

All Replies (1)

Gingerbread Man
Gingerbread Man
more options

You should use Adblock Plus instead.

You can try the following, but error messages will pop up in dialog boxes instead of showing in the respective tab.

  1. Type about:config into the address bar and press Enter.
  2. To bypass the warning, press the big button labeled "I'll be careful, I promise!".
  3. In the search box, paste browser.xul.error_pages.enabled
  4. In the search results, double-click browser.xul.error_pages.enabled to set its value to false.