Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

How do you hide installed plugins in Firefox?

This website shows that too much about you can be seen:

Most plugins don't need to be seen by content providers.

share|improve this question
wow, Browser Mirror is pretty nice for spotting security holes...+1! – studiohack Apr 29 '10 at 17:08
crashes my firefox 3.6.3 on win7x64 – Nifle May 27 '10 at 22:56

Go to about:config and type plugins.enumerable_names in the search box.

Set it to blank and that will hide all plugins from a bulk plugin query. Individual plugins can still be queried by name, but this will help reduce your fingerprint a lot.

This works on Firefox 29+.

share|improve this answer
Why minus one? This looks like a legit useful answer to me… Upvoting but I would still like to know why someone did downvote it. – JeromeJ Oct 12 '14 at 16:04

There isn't a way to do this yet in firefox. This is necessary so that the server you are connecting to can know what form to send the content back to you in. The closest analogy I can draw is how SSL sends all of the acceptable connection types (SSL1, TSL, etc.) and the server can pick what it wants to use to communicate. When we are sending all this information to the server we are letting it know that we have these plugins and it can send us content we will be able to use.

share|improve this answer
Yet? Is it being planned? I realize the point, but again, most plugins don't need to be seen. For example, the Foxit Reader plugin. Foxit is an alternative for viewing .PDF documents. Nobody needs to know what I'm using to view .PDF files. I disabled the plugin, and when I opened the next .PDF Firefox asked me what to do, I said "remember," and it uses Foxit without people knowing. But some plugins you need, and the other end doesn't need to know the details. – Carl May 1 '10 at 15:02
I don't know of any plans to add this functionality. Overall it isn't to much of a concern. Ther are so many bigger attacks which can be levied against a browser for disclosure of information such as the CSS visited link attack which can find out your browsing history, and a number of others. This really is relatively minor and is necessary for the way the web works. I really wouldn't be that concerned about it. If you are I suggest using a proxy server (CGIirc like) – Daisetsu May 1 '10 at 17:26
I found the above centralops site wouldn't tell me what Firefox was running until I allowed it in NoScript. – Umber Ferrule Aug 2 '10 at 22:50

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.