Opencart Product Options are not showing in Firefox

Issue in Opencart

Dropdown (select) with Options for products is not available. Writing in the search box does not show any options. Maybe other functionality in administrative is affected.

Affected versions

Affected browsers by the bug: Firefox
Not affected browsers by the bug: Chrome, Internet Explorer

Affected Opencart versions: 2.3.0.2, possibly others.

Workaround (partial solution)

Use any of not affected browsers as a workaround. It is needed only for administrative part of Opencart. Visitors could browse the shop with any browser.

Please, share any other information, which could help users of Opencart.

Tags: Edit Product, Products Home Products