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

Could you please have a look at . It explains how to customize Mozilla Firefox using 'userContent.css'. How can I do it in Internet Explorer ?

share|improve this question
You should probably cut and past your code in. I'm pretty sure your CSS is wrong. . . – surfasb Aug 9 '11 at 6:12
I don’t see what’s wrong with it. It works just fine. – Synetech Aug 9 '11 at 6:25
up vote 2 down vote accepted

Internet Options->General->Accessibility->Format documents using my style sheet :

In Internet Explorer (or the Control Panel), select Internet Options, then click the Accessibility button in the General tab. Check the Format documents using my stylesheet check-box and click Browse to select a CSS stylesheet of your choosing. (Click OK, OK.)

Now your user-stylesheet will be applied to all websites that you browse, depending on what you put it in.

share|improve this answer
I specified img { opacity: 0.03; } in a file and then browsed and selected it. But it DO NOT work – Rauf Aug 9 '11 at 6:01
Yes it does. It won’t take until you close and re-open the browser, or at least a tab; simply reloading the page isn’t enough. (When testing CSS, I prefer to use something like * {background:#ff0000;}; it’s much more noticeable and universally applicable.) – Synetech Aug 9 '11 at 6:25

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.