I'm currently working on an extension to integrate two systems at my work, The chrome extension is running just fine and working well, but my team also asked for a firefox version, in firefox I'm having trouble with the xmlhttprequest(),

the function that calls the request is this one:

function getModelList(API_KEY)
{
  return new Promise(resolve => {
    var xmlHttp = new XMLHttpRequest();
    xmlHttp.open( "POST", 'http://10.255.12.128/api/get_models/', true );
    xmlHttp.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
    xmlHttp.onload = function(e) {
      resolve(xmlHttp.response);
    };
    xmlHttp.onerror = function (e) {
      resolve(undefined);
      console.error("** An error occurred during the XMLHttpRequest");

    };
    xmlHttp.send( 'API_KEY='+API_KEY );
  })
}

(I know it not secure to send the API_KEY in the POST, but it only runs in our localnetwork so its probably fine for now)

When I run it, it goes direcly to onerror, It is faster then the timeout, and don't show in the network tab on inspection, I think I need to give it some permissions or something in firefox so it can run?

also, the manifest for the extension is this one(maybe the problem is here?):

{
    "name" : "Zabbix-Bitrix Integration",
    "version": "0.0.4",
    "manifest_version": 2,
    "description" : "Insere funções extras ao zabbix",
    
    "options_ui": {
        "page": "options.html",
        "open_in_tab": false,
        "browser_style": true,
        "chrome_style": true
    },

    "content_scripts" : [
        {
            "js" : ["init.js"],
            "css": ["styles.css"],
            "matches" : ["*://zabbix.monitor.redeunifique.com.br/zabbix.php?action=problem.view*"]
        }
    ],
    "permissions": ["storage","webRequest"]
}

@edit, after some digging, found an error message: Error: Got a request http://10.255.12.128/api/get_models/ without a browsingContextID set

The function that calls the error has this comment:

// Ensure that we have a browsing context ID for all requests when debugging a tab (=`browserId` is defined).
// Only privileged requests debugged via the Browser Toolbox (=`browserId` null) can be unrelated to any browsing context.
if (!this._browsingContextID && this._networkEventWatcher.browserId) {
  throw new Error(
    `Got a request ${this._request.url} without a browsingContextID set`
  );
}

How and where do I set this Context ID ?