All Submissions:

• Have you followed the WooCommerce Contributing guideline?
• Does your code follow the WordPress' coding standards?
• Have you checked to ensure there aren't other open Pull Requests for the same update/change?

Changes proposed in this Pull Request:

Autocomplete is defaulted to on in most browsers, this is usually fine, but Firefox will overwrite the actual value with whatever user-entered last. This means if we change the quantity in some other page, and then refresh the cart page, the last entered value in the cart page will be displayed, overwriting the actual value passed by the server.

So autocomplete is disabled by default for the quantity input field, further a filter is added like other fields in case this needs to be modified.

Closes #30733.

How to test the changes in this Pull Request:

From #30733:

1. Add a product to your cart. There must be at least 2 of these products available.
2. Visit the cart page and modify the quantity of the item. Update the cart and confirm the quantity has been updated and that the item is still in your cart.
3. In a separate tab, visit the product page and add the product to your cart again. This must be the same product (and, if applicable, the same variation) you previously modified.
4. Refresh the original tab. The cart should now have updated totals reflecting the action taken in step 3. The quantity input will also be correct if this patch is applied. Without this patch, you will still see the old quantity value.

Other information:

• Have you added an explanation of what your changes do and why you'd like us to include them?
• Have you written new tests for your changes, as applicable?
• Have you successfully run tests with your changes locally?

Changelog entry

Tweak - Disable autocomplete on quantity input field to prevent stale values in Firefox.

FOR PR REVIEWER ONLY:

• I have reviewed that everything is sanitized/escaped appropriately for any SQL or XSS injection possibilities. I made sure Linting is not ignored or disabled.