Issue summary

1. When using the Companion App with Firefox, after saving the changes to the attachment, and selecting Upload, Firefox will show this prompt.
   • This page is asking you to confirm that you want to leave - data you have entered may not be saved.
   • Options: Leave Page Stay in Page
2. We can just click on Leave Page, and everything works as expected.
3. But this is an extra step.

Suggestion

1. If possible, send Firefox the required data so that it does not think we have unsaved data, and does not prompt the message.

Workaround

1. Type in the address bar about:config and press Enter.
   • (Promise to be careful, if asked)
2. Type in the search bar and look for the preference :
   • dom.disable_beforeunload
3. Set it's value to true.