diff --git a/README.md b/README.md
index 506cfe8..f2c2a69 100644
--- a/README.md
+++ b/README.md
@@ -47,23 +47,7 @@ This setting have side effects, so use it at your own risk.
 
 ### Vendor Prefixes
 
-I do not plan to support CSS3 properties (or functions) with vendor prefixes,
-such as `-webkit-` or `-moz-`, etc. These are hard to maintain because they are:
-
-  * Added frequently
-  * Changed unexpectedly
-  * Removed silently
-
-These must be supported by separate syntax plugins (Vim 7.4's default CSS syntax
-file supports this). If you want to highlight prefixed properties or functions
-manually, `:highlight` and `:match` would help:
-
-    :highlight VendorPrefix guifg=#00ffff gui=bold
-    :match VendorPrefix /-\(moz\|webkit\|o\|ms\)-[a-zA-Z-]\+/
-
-These commands highlight vendor prefixed properties and functions instantly with
-cyan and bold (on gVim).
-
+In the process of adding!
 
 ### CSS Preprocessors: [Sass][2], [LESS][3], and [Stylus][4]
 
diff --git a/after/syntax/css/.css3-background.vim.swp b/after/syntax/css/.css3-background.vim.swp
new file mode 100644
index 0000000..1a4eb1f
Binary files /dev/null and b/after/syntax/css/.css3-background.vim.swp differ
diff --git a/after/syntax/css/css3-background.vim b/after/syntax/css/css3-background.vim
index 84fb81b..08286cc 100644
--- a/after/syntax/css/css3-background.vim
+++ b/after/syntax/css/css3-background.vim
@@ -1,7 +1,7 @@
 " TODO: create cssBackgroundProp group and cssBackgroundAttr group
-syn match cssFontProp contained "\<background-\(clip\|origin\|size\)\>"
+syn match cssFontProp contained "\<\(\(-webkit\|-moz\|-o\|-ms\)-\)background-\(clip\|origin\|size\)\>"
 syn match cssFontProp contained "\<border-image\(-\(source\|slice\|width\|outset\|repeat\)\)\=\>"
-syn match cssFontProp contained "\<border-\(\(top-right\|bottom-right\|bottom-left\|top-left\)-\)\=radius\>"
-syn match cssFontProp contained "\<box-shadow\>"
+syn match cssFontProp contained "\<\(\(-webkit\|-moz\|-o\|-ms\)-\)border-\(\(top-right\|bottom-right\|bottom-left\|top-left\)-\)\=radius\>"
+syn match cssFontProp contained "\<\(\(-webkit\|-moz\|-o\|-ms\)-\)box-shadow\>"
 syn keyword cssFontAttr contained space round local fill stretch clone slice
 syn match cssFontAttr contained "\<\(padding\|border\|content\)-box\>"
diff --git a/after/syntax/css/css3-fonts.vim b/after/syntax/css/css3-fonts.vim
index 72ab100..06ca28d 100644
--- a/after/syntax/css/css3-fonts.vim
+++ b/after/syntax/css/css3-fonts.vim
@@ -11,7 +11,9 @@ syn match cssFontAttr contained "\<all-small-caps\>"
 syn match cssFontAttr contained "\<\(all-\)\=petite-caps\>"
 syn match cssFontAttr contained "\<titling-caps\>"
 syn match cssFontAttr contained "\<\(lining\|oldstyle\|proportional\|tabular\)-nums\>"
+syn match cssFontProp contained "\<\(\(-webkit\|-moz-osx\)-\)font-smoothing\>"
 syn match cssFontAttr contained "\<\(diagonal\|stacked\)-fractions\>"
+syn match cssFontAttr contained "\<grayscale\>"
 syn match cssFontAttr contained "\<slashed-zero\>"
 syn match cssFontAttr contained "\<proportional-width\>"
 syn region cssFunction contained matchgroup=cssFunctionName start="\<\(stylistic\|styleset\|character-variant\|swash\|ornaments\|annotation\)\s*(" end=")" oneline keepend
diff --git a/after/syntax/css/css3-transforms.vim b/after/syntax/css/css3-transforms.vim
index e7642ac..432963d 100644
--- a/after/syntax/css/css3-transforms.vim
+++ b/after/syntax/css/css3-transforms.vim
@@ -1,7 +1,7 @@
 " TODO: create cssTransformsProp group and cssTransformsAttr group
 syn match cssFontProp contained "\<backface-visibility\>"
 syn match cssFontProp contained "\<perspective\(-origin\)\=\>"
-syn match cssFontProp contained "\<transform\(-\(origin\|style\)\)\=\>"
+syn match cssFontProp contained "\<\(\(-webkit\|-moz\|-o\|-ms\)-\)transform\(-\(origin\|style\)\)\=\>"
 syn keyword cssFontAttr contained flat
 syn match cssFontAttr contained "\<preserve-3d\>"
 syn region cssFunction contained matchgroup=cssFunctionName start="\<\(matrix\(3d\)\=\|translate\(3d\|X\|Y\|Z\)\=\|scale\(3d\|X\|Y\|Z\)\=\|rotate\(3d\|X\|Y\|Z\)\=\|skew\(X\|Y\)\=\|perspective\)\s*(" end=")" oneline keepend
diff --git a/after/syntax/css/css3-ui.vim b/after/syntax/css/css3-ui.vim
index 8f7d2fb..9afa96b 100644
--- a/after/syntax/css/css3-ui.vim
+++ b/after/syntax/css/css3-ui.vim
@@ -1,5 +1,5 @@
 syn keyword cssUIProp contained icon resize
-syn match cssUIProp contained "\<box-sizing\>"
+syn match cssUIProp contained "\<\(\(-webkit\|-moz\|-o\|-ms\)-\)box-sizing\>"
 syn match cssUIProp contained "\<ime-mode\>"
 syn match cssUIProp contained "\<nav-\(index\|up\|right\|down\|left\)"
 syn match cssUIProp contained "\<outline-offset\>"