Issue Summary

Embedding of links to another site's work item does not work in the Mozilla Firefox browser.

Steps to Reproduce

1. Using Firefox, navigate to Jira site A
2. Create a, or locate an existing, Jira work item and copy its URL
3. Navigate to Jira site B
4. Create a, or navigate to an existing, Jira work item page and paste the URL in the description
5. Change the link to an embed using the toolbar
6. Observe that the embed shows the message "We can't show your content. This may be because you’re not logged in. Try opening the work item."

1. Click Open in Jira and observe that your logged into the other site
2. Observe that the embed does not update

Expected Results

Should be able to preview the embedded link for another page.

Actual Results

Embedding of links to another Jira site's work item does not work in the Mozilla Firefox browser.

Workaround

Currently there is no known workaround for this behavior. A workaround will be added here when available