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diff --git a/devtools/shared/jsbeautify/UPGRADING.md b/devtools/shared/jsbeautify/UPGRADING.md
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+# UPGRADING
+
+1. `git clone https://github.com/beautify-web/js-beautify.git`
+
+2. Copy `js/lib/beautify.js` to `devtools/shared/jsbeautify/src/beautify-js.js`
+
+3. Remove the acorn section from the file and add the following to the top:
+
+ ```
+ const acorn = require("acorn/acorn");
+ ```
+
+4. Just above `function Beautifier(js_source_text, options) {` add:
+
+ ```
+ exports.jsBeautify = js_beautify;
+ ```
+
+5. Copy `beautify-html.js` to `devtools/shared/jsbeautify/src/beautify-html.js`
+
+6. Replace the require blocks at the bottom of the file with:
+
+ ```
+ var beautify = require('devtools/shared/jsbeautify/beautify');
+
+ exports.htmlBeautify = function(html_source, options) {
+    return style_html(html_source, options, beautify.js, beautify.css);
+ };
+ ```
+
+7. Copy `beautify-css.js` to `devtools/shared/jsbeautify/src/beautify-css.js`
+
+8. Replace the global define block at the bottom of the file with:
+ ```
+ exports.cssBeautify = css_beautify;
+ ```
+9. Copy `js/test/beautify-tests.js` to `devtools/shared/jsbeautify/src/beautify-tests.js`