title: How can i resolve the css warnings for browser specific selectors in Bootstrap 3?
body: <p>Just include bootstrap.js and css files and open google chrome's console, there are a lot of "Invalid CSS property xxx" outputs, I haven't seen this before on bootstrap 2.3.2</p>
  
  <p>I've copied the warnings below. They crowd my console:</p>
  
  <pre><code>Invalid CSS selector: button::-moz-focus-inner,input::-moz-focus-inner (12:59:57:616 | warning, css)
    at public_html/css/bootstrap.min.css:9
  Invalid CSS selector: .form-control:-moz-placeholder (12:59:57:630 | warning, css)
    at public_html/css/bootstrap.min.css:9
  Invalid CSS selector: .form-control::-moz-placeholder (12:59:57:631 | warning, css)
    at public_html/css/bootstrap.min.css:9
  Invalid CSS selector: .form-control:-ms-input-placeholder (12:59:57:661 | warning, css)
    at public_html/css/bootstrap.min.css:9
  Invalid CSS property name: -webkit-overflow-scrolling (12:59:57:662 | warning, css)
    at public_html/css/bootstrap.min.css:9
  Invalid CSS property value: transform .3s ease-out (12:59:57:663 | warning, css)
    at public_html/css/bootstrap.min.css:9
  Invalid CSS property value: -webkit-linear-gradient(left,color-stop(rgba(0,0,0,0.5) 0),color-stop(rgba(0,0,0,0.0001) 100%)) (12:59:57:664 | warning, css)
    at public_html/css/bootstrap.min.css:9
  Invalid CSS property value: -webkit-linear-gradient(left,color-stop(rgba(0,0,0,0.0001) 0),color-stop(rgba(0,0,0,0.5) 100%)) (12:59:57:670 | warning, css)
    at public_html/css/bootstrap.min.css:9
  Invalid CSS property value: -webkit-linear-gradient(top,#fff,0%,#e6e6e6,100%) (12:59:57:674 | warning, css)
    at public_html/css/bootstrap-theme.min.css:1
  Invalid CSS property value: -webkit-linear-gradient(top,#428bca,0%,#3071a9,100%) (12:59:57:675 | warning, css)
    at public_html/css/bootstrap-theme.min.css:1
  Invalid CSS property value: -webkit-linear-gradient(top,#5cb85c,0%,#449d44,100%) (12:59:57:683 | warning, css)
    at public_html/css/bootstrap-theme.min.css:1
  Invalid CSS property value: -webkit-linear-gradient(top,#f0ad4e,0%,#ec971f,100%) (12:59:57:684 | warning, css)
    at public_html/css/bootstrap-theme.min.css:1
  Invalid CSS property value: -webkit-linear-gradient(top,#d9534f,0%,#c9302c,100%) (12:59:57:684 | warning, css)
    at public_html/css/bootstrap-theme.min.css:1
  Invalid CSS property value: -webkit-linear-gradient(top,#5bc0de,0%,#31b0d5,100%) (12:59:57:685 | warning, css)
    at public_html/css/bootstrap-theme.min.css:1
  Invalid CSS property value: -webkit-linear-gradient(top,#428bca,0%,#357ebd,100%) (12:59:57:685 | warning, css)
    at public_html/css/bootstrap-theme.min.css:1
  Invalid CSS property value: -webkit-linear-gradient(top,#fff,0%,#f8f8f8,100%) (12:59:57:691 | warning, css)
    at public_html/css/bootstrap-theme.min.css:1
  Invalid CSS property value: -webkit-linear-gradient(top,#3c3c3c,0%,#222,100%) (12:59:57:692 | warning, css)
    at public_html/css/bootstrap-theme.min.css:1
  Invalid CSS property value: -webkit-linear-gradient(top,#dff0d8,0%,#c8e5bc,100%) (12:59:57:693 | warning, css)
    at public_html/css/bootstrap-theme.min.css:1
  Invalid CSS property value: -webkit-linear-gradient(top,#d9edf7,0%,#b9def0,100%) (12:59:57:694 | warning, css)
    at public_html/css/bootstrap-theme.min.css:1
  Invalid CSS property value: -webkit-linear-gradient(top,#fcf8e3,0%,#f8efc0,100%) (12:59:57:694 | warning, css)
    at public_html/css/bootstrap-theme.min.css:1
  Invalid CSS property value: -webkit-linear-gradient(top,#f2dede,0%,#e7c3c3,100%) (12:59:57:695 | warning, css)
    at public_html/css/bootstrap-theme.min.css:1
  Invalid CSS property value: -webkit-linear-gradient(top,#ebebeb,0%,#f5f5f5,100%) (12:59:57:696 | warning, css)
    at public_html/css/bootstrap-theme.min.css:1
  Invalid CSS property value: -webkit-linear-gradient(top,#428bca,0%,#3071a9,100%) (12:59:57:696 | warning, css)
    at public_html/css/bootstrap-theme.min.css:1
  Invalid CSS property value: -webkit-linear-gradient(top,#5cb85c,0%,#449d44,100%) (12:59:57:697 | warning, css)
    at public_html/css/bootstrap-theme.min.css:1
  Invalid CSS property value: -webkit-linear-gradient(top,#5bc0de,0%,#31b0d5,100%) (12:59:57:701 | warning, css)
    at public_html/css/bootstrap-theme.min.css:1
  Invalid CSS property value: -webkit-linear-gradient(top,#f0ad4e,0%,#ec971f,100%) (12:59:57:701 | warning, css)
    at public_html/css/bootstrap-theme.min.css:1
  Invalid CSS property value: -webkit-linear-gradient(top,#d9534f,0%,#c9302c,100%) (12:59:57:702 | warning, css)
    at public_html/css/bootstrap-theme.min.css:1
  Invalid CSS property value: -webkit-linear-gradient(top,#428bca,0%,#3278b3,100%) (12:59:57:702 | warning, css)
    at public_html/css/bootstrap-theme.min.css:1
  Invalid CSS property value: -webkit-linear-gradient(top,#f5f5f5,0%,#e8e8e8,100%) (12:59:57:703 | warning, css)
    at public_html/css/bootstrap-theme.min.css:1
  Invalid CSS property value: -webkit-linear-gradient(top,#428bca,0%,#357ebd,100%) (12:59:57:704 | warning, css)
    at public_html/css/bootstrap-theme.min.css:1
  Invalid CSS property value: -webkit-linear-gradient(top,#dff0d8,0%,#d0e9c6,100%) (12:59:57:704 | warning, css)
    at public_html/css/bootstrap-theme.min.css:1
  Invalid CSS property value: -webkit-linear-gradient(top,#d9edf7,0%,#c4e3f3,100%) (12:59:57:705 | warning, css)
    at public_html/css/bootstrap-theme.min.css:1
  Invalid CSS property value: -webkit-linear-gradient(top,#fcf8e3,0%,#faf2cc,100%) (12:59:57:705 | warning, css)
    at public_html/css/bootstrap-theme.min.css:1
  Invalid CSS property value: -webkit-linear-gradient(top,#f2dede,0%,#ebcccc,100%) (12:59:57:706 | warning, css)
    at public_html/css/bootstrap-theme.min.css:1
  Invalid CSS property value: -webkit-linear-gradient(top,#e8e8e8,0%,#f5f5f5,100%) (12:59:57:707 | warning, css)
    at public_html/css/bootstrap-theme.min.css:1
  </code></pre>
  
  <p>(
  Reformatting the code, stackoverflow asked me to add more details in description. I hit the same issue and this is the most relevant question in google search results, hopefully someone has a solution.
  )</p>