1368436 - TinyMCE in content script: "Promise rejection value is a non-unwrappable cross-compartment wrapper"

Status: RESOLVED INCOMPLETE

(Core :: JavaScript Engine, defect, P3)

Description

[edjroot]

Attachment: Zipped WebExtension which shows the problem.

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.36

Steps to reproduce:

I'm developing a WebExtension that replaces an old editor on a certain page by TinyMCE. All my code does is create a `textarea` and initialize TinyMCE using the jQuery version (`$('textarea').tinymce({})`).

The attached file contains basically the same code that is currently used on the actual extension, which works on Chrome but not on Firefox.


Actual results:

The editor is only partially "built" and is not functional. Apparently, the `iframe` is not fully generated.
The Firefox console shows the following error message: "Promise rejection value is a non-unwrappable cross-compartment wrapper. (unknown)" whenever I scroll the page, and sometimes when I click any of the editor's buttons.


Expected results:

The editor should be functional and no error messages should appear.
The expected behavior is observed on the latest version of Google Chrome.

Comment 1

[edjroot]

The problem occurs on all websites, not just the one in the example.