After changing in Configuration -> Advanced -> Developer

Merge JavaScript Files = Yes
Merge CSS Files = Yes

My site is not browsing correctly.

I believe returning back to

Merge JavaScript Files = No
Merge CSS Files = No

may help but “Save Config” button is not working any more..

Through debug console I see issue with on-click with button id="id_5552aa811a9448075ead92b4a88ba8c2"

Please help

  • Careful when merging JS files, as you may get conflicts between jQuery and Prototype at times, as they both use "$" Jan 3, 2017 at 22:32

1 Answer 1


If you are really desperate to undo/turn off the Javascript & CSS file merging, you can change the values directly in the database

Proceed with caution changing values directly on production databases.

Run the query below to locate the 2 rows where the config value is stored and change the values back to 0. Or you can just manually go to core_config_data and find rows with the following paths and set them to 0.

SQL Query: SELECT * FROM core_config_data WHERE path LIKE '%merge_%'

path column: dev/js/merge_files dev/css/merge_css_files

Screenshot of table: Sequel Pro

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge that you have read and understand our privacy policy and code of conduct.

Not the answer you're looking for? Browse other questions tagged or ask your own question.