1408291 - The content script use window.wrappedJSObject.fn passed Array, page script use Array.isArray return fasle

Status: RESOLVED INVALID

(WebExtensions :: General, defect)

Description

[pea3nut]

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:58.0) Gecko/20100101 Firefox/58.0
Build ID: 20171012105833

Steps to reproduce:

// page script
window.pageCall =function(arr){
    console.log(Array.isArray(arr));//false

    console.log(Object.prototype.toString.call(arr));
    //Error: Permission denied to access property Symbol.toStringTag
};

// content script
window.wrappedJSObject.pageCall([]);


Actual results:

I can't test passed arguments is an array or not.


Expected results:

Array.isArray is designed to compensate for instanceof right? It's should be work.

Comment 1

[pea3nut]

well, I try use cloneInto:

window.wrappedJSObject.pageCall(cloneInto([],window));

It works