Issue screen reloading twice in Firefox when Xporter is enabled

Issue screen reloading twice in Firefox when Xporter is enabled.

How to reproduce:

1. In Firefox browser and with Xporter enable.
2. Open the issues of a project, with the list of issues and a preview of the current issue can be seen.
3. Navigate through the issues and a flicker can be seen which looks like the issue is being reloaded twice.