The Tor Browser: diff layout/reftests/css-valuesandunits/unit-rem-div-width-inner.html

     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/layout/reftests/css-valuesandunits/unit-rem-div-width-inner.html	Wed Dec 31 06:09:35 2014 +0100
     1.3 @@ -0,0 +1,13 @@
     1.4 +<style>
     1.5 +:root { font-size: 20px }
     1.6 +body { font-size: 25px }
     1.7 +div {
     1.8 +  font-size: 30px;
     1.9 +  width: 15rem;
    1.10 +}
    1.11 +#b {
    1.12 +  border-bottom: 1px solid #f00;
    1.13 +}
    1.14 +</style>
    1.15 +
    1.16 +<body>Level 1<div id=a>Level 2<div id=b>Level 3</div></div></body>

The Tor Browser / file diff

diff: layout/reftests/css-valuesandunits/unit-rem-div-width-inner.html

layout/reftests/css-valuesandunits/unit-rem-div-width-inner.html