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Optimizely For 3 days when I start FF everyday I get a cookie "25134714.log.optimizely.com". Is this coming from FF? Read about it, but don't understand it.

Posted

I have FF 19.0.2 on a MacBook Pro. I'm wondering if a program is optimizing my computer without my knowing it. How do I get rid of it? or should I not worry about it. TY

Chosen solution

Linda33,
"Optimizely" is a company that tracks user behaviour on and across websites using cookies and a bit of javascript that web-masters voluntarily insert into their code. So mozilla.org has chosen to use this third party tracker, but it doesn't do anything that helps you.

So in addition to blocking third-party cookies, use the addon Ghostery at https://addons.mozilla.org/en-US/firefox/addon/ghostery/ . After you install it you can block these trackers. For eg, on this site you can click on the "Ghost" icon, then click on the slider next to "Optimizely" to permanently block it.

In fact, you can set Ghostery to block all trackers by default. Very occasionally you'll find one that is required (such as the Disqus tracker to enable their comment servers) but it's easy to selectively turn it back on again for that one tracker.

Read this answer in context 6

Additional System Details

Installed Plug-ins

  • Shockwave Flash 11.6 r602
  • Displays Java applet content, or a placeholder if Java is not installed.
  • The QuickTime Plugin allows you to view a wide variety of multimedia content in web pages. For more information, visit the QuickTime Web site.
  • NDS Player Plugin
  • iPhoto6

Application

  • User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:19.0) Gecko/20100101 Firefox/19.0

More Information

philipp
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2043 solutions 8891 answers

Enable and disable cookies that websites use to track your preferences

Paul451 3 solutions 20 answers

Chosen Solution

Linda33,
"Optimizely" is a company that tracks user behaviour on and across websites using cookies and a bit of javascript that web-masters voluntarily insert into their code. So mozilla.org has chosen to use this third party tracker, but it doesn't do anything that helps you.

So in addition to blocking third-party cookies, use the addon Ghostery at https://addons.mozilla.org/en-US/firefox/addon/ghostery/ . After you install it you can block these trackers. For eg, on this site you can click on the "Ghost" icon, then click on the slider next to "Optimizely" to permanently block it.

In fact, you can set Ghostery to block all trackers by default. Very occasionally you'll find one that is required (such as the Disqus tracker to enable their comment servers) but it's easy to selectively turn it back on again for that one tracker.

Modified by Paul451

Helpful Reply

Thank you Madperson and Paul for your responses, appreciate your time.

I will try the Ghostery and also block the third party cookies.