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Does userContent.css require a header? knowledge base doesn't say

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Hi,

Since many User Styles aren't working, I'm using userChrome.css, and I'm trying to use userContent.css. It's not working.

http://kb.mozillazine.org/index.php?title=UserContent.css&printable=yes doesn't explain how to write userContent.css to get it to work. It asks people to download a zip file instead of explaining how to write the thing.

http://kb.mozillazine.org/Editing_configuration/Manual_editing doesn't explain it either

http://kb.mozillazine.org/Editing_configuration/Troubleshooting doesn't explain it either

If it does require a header, what is that header? I've used the same header as for userChrome:

@namespace url(http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul);

Hi, Since many User Styles aren't working, I'm using userChrome.css, and I'm trying to use userContent.css. It's not working. http://kb.mozillazine.org/index.php?title=UserContent.css&printable=yes doesn't explain how to write userContent.css to get it to work. It asks people to download a zip file instead of explaining how to write the thing. http://kb.mozillazine.org/Editing_configuration/Manual_editing doesn't explain it either http://kb.mozillazine.org/Editing_configuration/Troubleshooting doesn't explain it either If it does require a header, what is that header? I've used the same header as for userChrome: @namespace url(http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul);

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Don't use the "XUL" header in userContent.css -- XUL is a language used only in the user interface.

(I don't use it in userChrome.css either, but it's slightly controversial. https://www.userchrome.org/adding-style-recipes-userchrome-css....)

You can optionally use an HTML namespace header in userContent.css, but it shouldn't make any difference. There must be some other issue.

  • Name -- as with userChrome.css, the file name of userContent.css must match exactly
  • Location -- same chrome folder as userChrome.css

Now, as for the specific user styles, if they don't work in Stylus perhaps they just don't work??

The only reason to use a userContent.css file instead of Stylus, in my opinion, is to modify internal Firefox pages like the Add-ons page or new tab page. For regular web pages, it's easier to use Stylus.

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userChrome.css is for making changes to the Firefox user interface. For some (html namespace) elements you sometimes need to override the default XUL name space (*|<element>). userContent.css is for styling web pages and doesn't need a @namespace header or it would be the default HTML namespace.

@namespace url(http://www.w3.org/1999/xhtml);

Both files support @-moz-document rules to limit the rules to a specific domain or URL.