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+# UPGRADING
+
+1. `git clone https://github.com/beautify-web/js-beautify.git`
+
+2. `cd js-beautify`
+
+3. Retrieve the latest tag with
+
+```
+git describe --tags `git rev-list --tags --max-count=1`
+```
+
+4. Move to the latest tag `git checkout ${latestTag}` (`${latestTag}` should be replaced with
+ what was printed at step 3).
+
+5. `npm install`
+
+6. `npx webpack`
+
+7. Copy `js/lib/beautify.js` to `devtools/shared/jsbeautify/src/beautify-js.js`
+
+8. Copy `js/lib/beautify-html.js` to `devtools/shared/jsbeautify/src/beautify-html.js`
+
+9. Replace the following line at the bottom of the file:
+
+```
+var js_beautify = require('./beautify.js');
+```
+
+with (changing `beautify.js` into `beautify-js.js`):
+
+```
+var js_beautify = require('./beautify-js.js');
+```
+
+10. Copy `js/lib/beautify-css.js` to `devtools/shared/jsbeautify/src/beautify-css.js`