tinymceeditor becomes unresponsive with Firefox + div + curly bracket in url + ampersand in url

To Reproduce

1. Use Firefox
2. Put this wiki code in a page

   | [http://www.google.com/#x=y&q={hi}] |

3. Save the page
4. Edit the page

Expected Result
go to editing the page

Actual Result
In some versions of Firefox, it just never loads
In other versions of Firefox, you get the attached Unresponsive Script notice

Additional Information
This seems like an edge case, but many of our users copy and paste URL's from SharePoint into Confluence.
Those URL's that they paste often have an incorrectly encoded parameter in them like this

http://sharepoint.../folder/folder/folder/?root=somefolder&View={478-58239-38729832}

We figured out that it's only if

1. There's both a "&" and a "{" in a wiki link
2. the link is contained in a <div>, like via a table