If you change the BIDI text direction via "Ctrl+Shift+X" then Firefox should remember this although I don't know whether this is website dependent.

Because there is likely JavaScript active to set the proper BIDI direction, you may not be able to override this in userChrome.css.

Did you try to place these rules above the @namespace line or place the code in a separate file via @import url("<file>"); and don't use the default @namespace line?

I tested with this code in a LTR locale and have the text aligned to the right, but can't use Ctrl+Shift+X

*|input.urlbar-input:-moz-locale-dir(ltr) {
 text-align: right !important;
}

Try this code:

*|input.urlbar-input:-moz-locale-dir(rtl) {
 text-align: left !important;
}

Hello cor-el,

Thanks for testing and replying. I appreciate it.

I actually did not use the @namespace line at all. https://www.userchrome.org/adding-style-recipes-userchrome-css.html

I'm not quite sure if you were somehow able to override the source file with userChrome.css.

Regarding "Ctrl+Shift+X": you're right. With the following code it does work.

html|input.urlbar-input {

 direction: ltr !important;
 text-align: left !important;

}

html|input.urlbar-input[dir=rtl] {

 text-align: right !important;

}

If you use the html namespace in a rule then you need to add the line that define this namespace at the top of the userChrome.css file as you can see in the browser.css file. Otherwise html|<element> can't be resolved to the proper namespace.

• https://dxr.mozilla.org/mozilla-release/source/browser/base/content/browser.css
• @namespace html url("http://www.w3.org/1999/xhtml");

Actually, best is probably to add this rule like I posted above via a separate file this is imported in userChrome.css that has the proper @namespace line(s).

I used *|input.urlbar-input instead of html|input.urlbar-input to make this work for all namespaces to avoid having to add a HTML namespace line.

Hello cor-el,

Great! Thank you very much.

Your code indeed overrides the source file.

• |input.urlbar-input { direction: ltr !important; text-align: left !important; }
• |input.urlbar-input[dir=rtl] { text-align: right !important; }

Best regards.