List and call js functions from a newly loaded tab from firefox extension

Question

I am interested in scanning a new opened tab's content for any javascript functions that are on the page, and being able to call them. What is the proper way to do this?

I have a handle to the tab, because I am using

tabs.on('ready, function (tab) {
    var functionNames = [];
    for (var f in tab) {
        if(tab.hasOwnProperty(f) && typeof tab[f] === 'function') { functionNames.push(f);
        }
    }
console.log(functionNames);
}

However, this gives me an error that tab does not have hasOwnProperty

I have tried to change it to this and window as well and neither have worked.

Answer 1

创建沙箱后，您可以进入并查看窗口对象上的所有内容： https : //developer.mozilla.org/zh-CN/docs/Mozilla/Tech/XPCOM/Language_Bindings/Components.utils.Sandbox#Executing_in_current_tab_scope