I am using the add-on stylish in Firefox 8.0. I particularly like a plain style and I want to apply to all website. Can I do that? I tried *.com and it doesn't work.
You can apply a style to all websites by using the XHTML namespace:
Alternatively, to only modify the Firefox UI, you would use the XUL namespace:
So, if you do not include a namespace, Stylish will modify all elements in Firefox.
I found the XHTML namespace rule
To style all web sites, I use the following
Documentation on Mozilla Developer Network: