[css] How to target only IE (any version) within a stylesheet?

I have an inherited project and there are places where it's an utter mess. This is one of them. I need to target only IE (any version).

#nav li {
    float: left;
    height: 54px;
    background: #4f5151;
    display: table;
    border-left: 1px solid grey;
}

To be clear: Inside the embedded stylesheet and without adding ID's or classes to the tags in the html, I need to apply the border style only if the user is using IE. How can I do this?

Edit: found a solution for Firefox, editing question to reflect this.

For targeting IE only in my stylesheets, I use this Sass Mixin :

@mixin ie-only {
  @media all and (-ms-high-contrast: none), (-ms-high-contrast: active) {
    @content;
  }
}

When using SASS I use the following 2 @media queries to target IE 6-10 & EDGE.

@media screen\9
    @import ie_styles
@media screen\0
    @import ie_styles

http://keithclark.co.uk/articles/moving-ie-specific-css-into-media-blocks/

Edit

I also target later versions of EDGE using @support queries (add as many as you need)

@supports (-ms-ime-align:auto)
    @import ie_styles
@supports (-ms-accelerator:auto)
    @import ie_styles

https://jeffclayton.wordpress.com/2015/04/07/css-hacks-for-windows-10-and-spartan-browser-preview/

Here's a collection of media queries that will allow you to do that for any version of Internet Explorer (from IE6 to IE11+), Firefox, Chrome & Safari (EDIT: also added Opera).

IE 6

* html .ie6 { property: value; }

or

.ie6 { _property: value; }

IE 7

*+html .ie7 { property: value; }

or

*:first-child+html .ie7 { property: value; }

IE 6 and 7

@media screen\9 { 
    .ie67 {
        property: value; 
    }
}

or

.ie67 { *property: value; }

or

.ie67 { #property: value; }

IE 6, 7 and 8

@media \0screen\,screen\9 {
    .ie678 {
        property: value;
    }
}

IE 8

html>/**/body .ie8 { property: value; }

or

@media \0screen {
    .ie8 {
        property: value;
    }
}

IE 8 Standards Mode

.ie8 { property /*\**/: value\9 }

IE 8,9 and 10

@media screen\0 {
    .ie8910 {
        property: value;
    }
}

IE 9 only

@media screen and (min-width:0\0) and (min-resolution: .001dpcm) { 
    // IE9 CSS
    .ie9{
        property: value;
    }
}

IE 9 and above

@media screen and (min-width:0\0) and (min-resolution: +72dpi) {
    // IE9+ CSS
    .ie9up { 
        property: value; 
    }
}

IE 9 and 10

@media screen and (min-width:0\0) {
    .ie910 {
        property: value\9;
    } /* backslash-9 removes ie11+ & old Safari 4 */
}

IE 10 only

_:-ms-lang(x), .ie10 { property: value\9; }

IE 10 and above

_:-ms-lang(x), .ie10up { property: value; }

or

@media all and (-ms-high-contrast: none), (-ms-high-contrast: active) {
    .ie10up {
        property:value;
    }
}

IE 11 (and above..)

_:-ms-fullscreen, :root .ie11up { property: value; }

Firefox (any version)

@-moz-document url-prefix() {
    .ff {
        color: red;
    }
}

Firefox (Quantum Only / Stylo)

@-moz-document url-prefix() {
    @supports (animation: calc(0s)) {
        /* Stylo */
        .ffStylo {
            property: value;
        }
    }
}

Firefox Legacy (pre-Stylo)

@-moz-document url-prefix() {
    @supports not (animation: calc(0s)) {
        /* Gecko */
        .ffGecko {
            property: value;
        }
    }
}

Webkit (Chrome & Safari, any version)

@media screen and (-webkit-min-device-pixel-ratio:0) { 
    property: value;
}

Google Chrome (29+)

@media screen and (-webkit-min-device-pixel-ratio:0) and (min-resolution:.001dpcm) {
    .chrome {
        property: value;
    }
}

Safari (7.1+)

_::-webkit-full-page-media, _:future, :root .safari_only {
    property: value;
}

Safari (from 6.1 to 10.0)

@media screen and (min-color-index:0) and(-webkit-min-device-pixel-ratio:0) { 
    @media {
        .safari6 { 
            color:#0000FF; 
            background-color:#CCCCCC; 
        }
    }
}

Safari (10.1+)

@media not all and (min-resolution:.001dpcm) { 
    @media {
        .safari10 { 
            color:#0000FF; 
            background-color:#CCCCCC; 
        }
    }
}

Opera (12+)

@media (min-resolution: .001dpcm) {
    _:-o-prefocus, .selector {
        .opera12 {
            color:#0000FF; 
            background-color:#CCCCCC; 
        }
    } 
}

Opera (11 and lower)

@media all and (-webkit-min-device-pixel-ratio:10000), not all and (-webkit-min-device-pixel-ratio:0) {
    .opera11 {
        color:#0000FF; 
        background-color:#CCCCCC; 
    }
}

For further info or additional media queries, visit the browserhacks.com web site and/or check out this blog post that I wrote on this topic.

Another working solution for IE specific styling is

<html data-useragent="Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.2; Trident/6.0)">

And then your selector

html[data-useragent*='MSIE 10.0'] body .my-class{
        margin-left: -0.4em;
    }

After experiencing issues with sites breaking on Edge when using High Contrast Mode, I came across the following work by Jeff Clayton:

https://browserstrangeness.github.io/css_hacks.html

It's a crazy, weird media query, but those are easier to use in Sass:

@media screen and (min-width:0\0) and (min-resolution:+72dpi), \0screen\,screen\9 {
   .selector { rule: value };
}

This targets IE versions expect for IE8.

Or you can use:

@media screen\0 {
  .selector { rule: value };
}

Which targets IE8-11, but also triggers FireFox 1.x (which for my use case, doesn't matter).

Right now I'm testing with print support, and this seems to be working okay:

@media all\0 {
  .selector { rule: value };
}