diff --git a/odoo/addons/base/models/assetsbundle.py b/odoo/addons/base/models/assetsbundle.py
index f058f9b8493..002d8ad2d45 100644
--- a/odoo/addons/base/models/assetsbundle.py
+++ b/odoo/addons/base/models/assetsbundle.py
@@ -422,6 +422,8 @@ class AssetsBundle(object):
         css_content = '\n'.join(asset.minify() for asset in self.stylesheets)
 
         # Post process the produced css to add required vendor prefixes here
+        css_content = re.sub(r'(appearance: (\w+);)', r'-webkit-appearance: \2; -moz-appearance: \2; \1', css_content);
+
         css_content = re.sub(r'(display: ((?:inline-)?)flex((?: ?!important)?);)', r'display: -webkit-\2flex\3; \1', css_content)  # For PhantomJS tests
         css_content = re.sub(r'(flex-flow: (\w+ \w+);)', r'-webkit-flex-flow: \2; \1', css_content) # For PhantomJS tests
         css_content = re.sub(r'(flex: (\d+ \d+ (?:\d+|auto));)', r'-webkit-flex: \2; \1', css_content)  # For PhantomJS tests