diff --git a/src/data/presets.js b/src/data/presets.js
index 394f0134..7a60a04a 100644
--- a/src/data/presets.js
+++ b/src/data/presets.js
@@ -1,7 +1,7 @@
 const zero = {
   // Markdown extensions
   markdown: {
-    abbr: true,
+    abbr: false,
     breaks: false,
     deflist: false,
     del: false,
diff --git a/src/extensions/katexExtension.js b/src/extensions/katexExtension.js
index df1f3a00..4eb3d198 100644
--- a/src/extensions/katexExtension.js
+++ b/src/extensions/katexExtension.js
@@ -6,7 +6,7 @@ extensionSvc.onGetOptions((options, properties) => {
   options.math = properties.extensions.katex.enabled;
 });
 
-extensionSvc.onInitConverter(3, (markdown, options) => {
+extensionSvc.onInitConverter(2, (markdown, options) => {
   if (options.math) {
     markdown.use(markdownItMath);
     markdown.renderer.rules.inline_math = (tokens, idx) =>