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Firefox Blocks some Adsense ads (Insecure Content)

CNXSoft
CNXSoft
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I've noticed since the update to 41 that Firefox will block some adsense ads from time to time, but no always. When this happens Firefox shows a icon on the address bar reading "Firefox is blocking content on this page". and "Insecure content".

If I run Firefox in safe mode, I still get the same problem. The pages are served over http, not https if that matters. I can disable protection manually and it works, but I wonder if that's a problem with some insecure ads served by Google, or that Firefox incorrectly reports some ads as insecure.

I've noticed since the update to 41 that Firefox will block some adsense ads from time to time, but no always. When this happens Firefox shows a icon on the address bar reading "Firefox is blocking content on this page". and "Insecure content". If I run Firefox in safe mode, I still get the same problem. The pages are served over http, not https if that matters. I can disable protection manually and it works, but I wonder if that's a problem with some insecure ads served by Google, or that Firefox incorrectly reports some ads as insecure.
Attached screenshots

Chosen solution

Correct - http://www.gstatic.com - is a non-secure server and Firefox doesn't like mixed content like that on an otherwise secure page.

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All Replies (3)

philipp
philipp
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hi, i couldn't reproduce that issue on a spot check - you might want to have a look in the security tab of the firefox web console to see if any mixed content warnings that would hold further clues show up once the issue occurs...

https://developer.mozilla.org/en-US/docs/Security/MixedContent#Warnings_in_Web_Console

CNXSoft
CNXSoft Question owner
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Thanks, I could see the ad tries to load a Flash file from http://www.gstatic.com. So maybe the ad is loaded from an https link, and it then loads http data, which explains why Firefox blocks it, is that right?

Web Console screenshot attached.

Modified by CNXSoft

the-edmeister
the-edmeister
  • Moderator
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Chosen Solution

Correct - http://www.gstatic.com - is a non-secure server and Firefox doesn't like mixed content like that on an otherwise secure page.