Help me fix a Javascript issue for a WordPress theme on firefox

Hi, there!

My client said that his website [url removed, login to view] has a strange problem when he checked on Firefox 40.0.2 or Firefox 43.x, but I can't reproduct the issue, because the website works properly on my computer, so I'm looking for someone who can reproduce this issue to help me fix this issue.

Issue Description.

When you open this website [url removed, login to view] on firefox(Mac), click "Open Catalog" button, he said, the book was still there but hidden, however, actually the book should be opened at this time. He said it seems the opacity was still 0.

If someone can reproduce this issue, hope you can help me to find the reason and fix it.


Skills: CSS, HTML, PHP, WordPress

See more: wordpress theme problem, open gl help, help website fix, javascript, jquery, help to fix, help me fix this, help me fix it, help me find a wordpress theme, help fix it, computer fix it website

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