diff --git a/packages/project-portal-content-netlify/src/cms/admin/admin.css b/packages/project-portal-content-netlify/src/cms/admin/admin.css
new file mode 100644
index 000000000..f1be6712b
--- /dev/null
+++ b/packages/project-portal-content-netlify/src/cms/admin/admin.css
@@ -0,0 +1,3 @@
+[data-slate-editor] {
+    -webkit-user-modify: read-write !important;
+}
diff --git a/packages/project-portal-content-netlify/src/cms/cms-utils.js b/packages/project-portal-content-netlify/src/cms/cms-utils.js
new file mode 100644
index 000000000..e5ea97104
--- /dev/null
+++ b/packages/project-portal-content-netlify/src/cms/cms-utils.js
@@ -0,0 +1,16 @@
+if (typeof window !== 'undefined') {
+
+  // add admin.css
+  const link = document.createElement('link')
+  link.type = 'text/css'
+  link.rel = 'stylesheet'
+  link.href = '/admin/admin.css'
+  document.head.appendChild(link)
+
+  if (process.env.NETLIFY_SITE_URL) {
+    window.localStorage.setItem(
+      'netlifySiteURL', process.env.NETLIFY_SITE_URL
+    )
+  }
+
+}
diff --git a/packages/project-portal-content-netlify/src/cms/cms.js b/packages/project-portal-content-netlify/src/cms/cms.js
index 15ee73db1..b9e150208 100644
--- a/packages/project-portal-content-netlify/src/cms/cms.js
+++ b/packages/project-portal-content-netlify/src/cms/cms.js
@@ -1,5 +1,8 @@
 import CMS from "netlify-cms-app"
 
+// Add custom styles to the index.html page
+import "./cms-utils"
+
 // The following configuration is merged with the configuration from the site's config.yml file
 // (if it exists in the site's directory static/admin/config.yml)
 CMS.init({